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Poems by Emily Dickinson / edited by Mabel Loomis Todd. Third series
Adaptive Radiation in the Characinide. The central figure of Atygnax bimaculatus with notched teeth probably represents the more primitive condition. The lower lefthand figure represents Anodus latior with no teeth and a very long alimentary canal, a mud eater. The lower right-hand figure represents the scissor-like jaw and teeth of Serrasaima humeralis whose relatives have been repeatedly reported to have killed bathers before they could reach shore after being attacked. The upper figure represents Raphiodon vulpinus Spix which has reached the extreme in conical teeth, the large canines protruding above when the jaws are closed. The over 100 South American genera and 500 species of this family offer pretty complete series from the center to the txtremes with many lateral branches
Callorhinus ursinug: A series of life studies
A. Old "Seecatch" 8 to 24 years, B. Young "Seecatch," Six to Eight Years, C. "Holluschickie" or young males, 2 years. D, "Markah" or mother nursing her "pup" I. E. "Cow" fanning herself. F, "Cow" sleeping. G, "Cow" napping and fanning herself. H. "Cow" crooning to the male. J. Characteristic position of old males
[Teredo navalis] Series of pallets selected to illustrate variation at Goat Island, San Francisco Bay
[Teredo navalis] Series of pallets selected to illustrate variation at Dumbarton, San Francisco Bay
[Teredo navalis] Series of pallets selected to illustrate variation at Crockett, San Francisco Bay
[Teredo navalis] Series of pallets from the Oakland Harbor Light Station, representing ages ofapproximatgely two weeks (?), one month, two months, three months, and four months respectively
Comparison of series of shells from Goat Island (left), Dumbarton (center), and Crockett (right), illustrating range of variation at each of these points
Differences in absolute size may be disregarded, as in this case no selection has been made for age
Series of shells from Crockett of progressively greater age from left to right, showing change in relative position of auricle through resorption of the dorsal ridge with growth
Comparison of series of shells from near the surface (left) and near the bottom (right) at Crockett
Series of shells of Teredo navalis from Crockett, showing effect of environment on growth of ridges. Note on each shell the unusual width of the interspace separating the newest ridge (left) from previous ridges
Fig.1.--Mature egg ready for union with male cell.
Fig.2.--Spermatozoa (male cells). Note length of tail and shape of head. No attempts were made to study the minute anatomy.
Fig.3.--Egg, twenty-five minutes after fecundation, showing the two polar cells (pc) and the faintly developed yolk love.
Fig.4.--Egg just previous to the first cleavage, showing large yolk lobe.
Fig.5.--The two-celled stage at the completion of the first cleavage, fifty minutes after fecundation. The larger cell contains the yolk lobe.
Figs. 6,7,8,9.--This series illustrates the process of cleavage in the egg during the change from the two-celled to the four-celled stage.
Fig.10.--The four-celled stage, one hundred and ten munites after fecundation. Side view.
Figs. 11,12.--The eight-celled stage, one hundred and forty-five minutes after fecundation.
Fig.13.--The sixteen-celled stae, one hundred and eighty-five munites after fecundation. Side view.
Figure of a Fish, Showing the Location of Parts Usually Referred to in Desciption : 1. Dorsal fin; 2. Adipose fin; 3. Caudal fin; 4. Anal fin; 5. Pectoral fin; 6. Ventral fin; 7. Lower jaw, or mandible; 8. Upper jaw, or maxillary; 8a. Supplemental maxillary; 9. Opercle; 10. Branchiostegals; 11. Caudal peduncle; 12. Lateral line; 13. Series of crosswise scales usually counted; 14. Snout; 15. Eye; 16. Head; 17. Depth; 18. Base of caudal; 19. Distance from snout to nape or occiput.
Fisheries Biological Station. Southwest portion of grounds, with principal buildings. Mississippi River in background. From left to right, temporary laboratory, boathouse, concrete ponds of series C, storage reservoir in foreground, tank house, and main laboratory
Cultivating mussels in France
1-Method of collecting mussels by means of a dredge, A; 2-bouchot d'aval; 3-bouchot batard covered with mussels; 4-view of a series of bouchots d'amont showing mussels under cultivation and mussel fisherman operating his acon, B, which is used for transporting mussels over the mud flats; 5-iron hook used in collecting seed mussels; 6-basked for receiving mussels (After Nouveau Illustre Dictionnaire Universal Encyclopedique, Paris)
Scallops: Changes in form of shell. A series of drawings illustrating the changes from the early veliger (the first shell), which is 1/10 of a millimeter in size, to a 2-millimeter scallop. Note (a) change from flat-hinged veliger (1) to the prodissoconch (2), with prominent umbones; (b) return to a straight hinge (3), witdth greater than height; (c) width and height become equal (8); (d) formation of 'ears' (10)
One of the small islands of the shore. The rock is the shale of the Port Renfrew series
Series of pools reaching above ordinary high water
Series of representative forms of Renfrewia
Scallops: Changes in form of shell. A series of drawings illustrating the changes from the early veliger (the first shell), which is 1/10 of a millimeter in size, to a 2-millimeter scallop. Note (a) change from flat-hinged veliger (1) to the prodissoconch
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