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[Star-Fishes]; From car, July 26, large specimen, 9 mm (13); From car, August 2, large specimen, 11 mm
1. [Star-Fishes]; From car, July 26, large specimen, 9 mm (13); From car, August 2, large specimen, 11 mm (14); From car, August 18, large specimen, 18 mm (15); From car, September 5, large specimen, 24 mm (16); From car, September 26, large specimen, 35 mm (17); From car, October 12, large specimen, 42 mm (18); From car, October 25, largest specimen, 54 mm (19)
Cucumaria frondosa side view (65), dorsal view (66); Thyone briareus dorsal view (67); Thyone unisemita
2. Cucumaria frondosa side view (65), dorsal view (66); Thyone briareus dorsal view (67); Thyone unisemita side view (68), ventral view (69); Cucumaria pulcherrima side view (70); thyone scabra side view of a young specimen (71); trochostoma ovliticum side view of contracted alcoholic specimen (72); Caudina arenata side view of contracted alcoholic specimen (73); Synapta inhaerens dorsal view (74); Synapta roseola dorsal view (75)
Mulinia lateralis, gray (1); Star-fish about 2 days old, much enlarged, devouring a clam. Outlines of
3. Mulinia lateralis, gray (1); Star-fish about 2 days old, much enlarged, devouring a clam. Outlines of stomach of star-fish can be seen through transparent shell of clam (2): Larva of star-fish, nearly ready to set, in side view; dark bands show position of vibratile cilia; intestine and stomach shaded; five lobes at lower portion of figure are beginning of the five arms (3); Piece of eelgrass with star-fish larvae just undergoing their transformation; two larvae at sides (4); Small specimens of star-fish from seaweed, about the first of July (5-8); ...Average star found upon eelgrass and seaweed, on July 15 (9); Large specimen from car, July 15 (10); From car, July 18, large specimen, 5 mm (11); From car, July 24, large specimen, 8 mm (12)
Dentition of Serrasalmo humeralis Cuvier & Valenciennes. The upper cut represents the palatines of a
4. Dentition of Serrasalmo humeralis Cuvier & Valenciennes. The upper cut represents the palatines of a specimen 170 mm. long; the rest are from a specimen 133 mm.
Dentition of Serrasalmo maculatus Kner. The upper cut represent the palatines of a specimen 177 mm. long;
5. Dentition of Serrasalmo maculatus Kner. The upper cut represent the palatines of a specimen 177 mm. long; the others are from a specimen 147 mm. long
Fossil Herring, Diplomystus humilis Leidy. (From a specimen obtained at Green River, wyo.) The scutes
6. Fossil Herring, Diplomystus humilis Leidy. (From a specimen obtained at Green River, wyo.) The scutes along the back lost in the specimen. Family Clupeidae
Specimen of Anomia ephippium L., Weymouth, taken upon Pecten maximus, the sculpture of which is reproduced
7. Specimen of Anomia ephippium L., Weymouth, taken upon Pecten maximus, the sculpture of which is reproduced on the upper valve of the Anomia, and even on a young Anomia attached to the larger specimen
Two spent male salmon, adult and grilse forms, found dead on the rack at Battle Creek fishery October
8. Two spent male salmon, adult and grilse forms, found dead on the rack at Battle Creek fishery October 28, 1900. Length from hinder edge of eye to base of tail, larger specimen 500 mm., smaller 455 mm; weight, larger specimen, 3,100 grams, smaller 1,200 grams
Asterias tenera, large specimen; aboral view (5); large specimen oral view (6); young, aboral view (7);
9. Asterias tenera, large specimen; aboral view (5); large specimen oral view (6); young, aboral view (7); Asterias austera (adult), aboral view (8); oral view (9)
Asterias forbesi (small specimen) Arboral view (1), Oral view (2); Asterias vulgaris (small specimen)
10. Asterias forbesi (small specimen) Arboral view (1), Oral view (2); Asterias vulgaris (small specimen) Arboral view (3), Oral view (4)
Potamogeton heterophyllus (16-17); Potamogeton perfoliatus (18-19) 16, aquarium specimen; 17, aquarium
11. Potamogeton heterophyllus (16-17); Potamogeton perfoliatus (18-19)
16, aquarium specimen; 17, aquarium specimen; 18, winter shoot showing elongation of internodes; 19, growing tips of same
View of under side of a young specimen of the common sturgeon (fig.27); View of the under side of a young
12. View of under side of a young specimen of the common sturgeon (fig.27); View of the under side of a young specimen of the blunt-nosed sturgeon of the Delaware, A. brevirostris Lee
17- Paralichthys albiguttus, Individual (B) on black background (1 sq. cm. circles) from August 1, 4:30
13. 17- Paralichthys albiguttus, Individual (B) on black background (1 sq. cm. circles) from August 1, 4:30 p.m. to August 2, 11 a.m. Probably not fully adapted; 18- P. albiguttus (E) 10 cm long, on black and white background (1 sq. cm. circles.... On this background the specimen was nearly uniformly gray much of the time, and the simulation of the figures in this background was at not time as good as it was in larger specimens, although on the finer-grained backgrounds it was quite good, showing that the maximum area of figures successfully simulated depends upon the size of the fish. 19-, P.Albiguttus, individual (C) 14 cm. long on black and white background (1 cm. squares..... 20- P.albiguttus (E) 10 cm long, on black and white background (5 mm squares)....
48- Paralichthys albiguttus, 12 cm long, fully adapted to a very light gray background. This specimen
14. 48- Paralichthys albiguttus, 12 cm long, fully adapted to a very light gray background. This specimen continuously appeared somewhat darker than the background. Note that the three ocelli have almost entirely disappeared. 49- Individual (B)..., on black and white background (dots 0.5 mm. in diameter).... Dots of this size, no matter how numerous, had no effect except perhaps to cause the skin to become uniformly slightly grayer. 50- Individual (B) on black and white background (dots 1 mm in diameter)...after having been fully adapted to 1 cm. squares. These spots have no appreciable effect on the skin unless they are more numerous than they are in this background. 51- Individual (B) on black and white background (dots 1 mm. in diameter)....after having been fully adapted to dots 2 mm. in diameter. Note that the posterior ocellus is much darker than on white, but that the two anterior ones are not....
21- Paralichthys albiguttus, 16 cm long, in shallow bluish-gray mottled granite pan.... Excellend simulation
15. 21- Paralichthys albiguttus, 16 cm long, in shallow bluish-gray mottled granite pan.... Excellend simulation of the background on the entire surface except the three ocelli, which are nearly black. 22- Same specimen photographed in the granite pan....very shortly after mechanical stimulation. Note the contrast due to the enlargement of the regions around the ocelli and the appearance of numerous dark and light spots. These regions and spots were considerably more pronounced immediately after stimulation. They become less conspicuous rapidly but it usually requires several minutes for them to disappear completely. They usually also appear when the animal is feeding.
Cardium corbis (young specimen)
16. Cardium corbis (young specimen)
Polynices triseriata : young and older specimen
17. Polynices triseriata : young and older specimen
Pygocentrus piraya (Cuvier). Specimen no. 3630, Berlin Museum, labelled "P.nigricans" in the hand-writing
18. Pygocentrus piraya (Cuvier). Specimen no. 3630, Berlin Museum, labelled "P.nigricans" in the hand-writing of Johannes Muller. 127 mm. long. Guliana.
Dentition of a large specimen of Myleus pacu Humboldt
19. Dentition of a large specimen of Myleus pacu Humboldt
Enlarged teeth of a young specimen of Myleus pacu Humboldt
20. Enlarged teeth of a young specimen of Myleus pacu Humboldt
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