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5-Paralichthys albiguttus, on very fine gray sand, almost entirely covered with sand, from August 19 to 21. Note the two small depressions in the sand at the base of the caudal fin. The lower one is much more prominent than the other. This individual breathed only through the lower gill. The water which entered the mouth passed back under the body and oozed up through the sand, forming the depressions. The animal was very effectively concealed. 6-Same individual uncovered.... 7- Paralichthys, 13 cm. long, in a glass dish over very fine black sand. Note the remarkable similarity between the pattern and the shade in the fish, especially the central part of the body, and those of the sand. The tips of the fins and the tail have no pigment and consequently stand out boldly against the background. 8- Paralichthys albiguttus, 16 and 10 cm long, on a smooth jet black background. Note the conspicuous white spots. In some instances all of these, except a trace of the one at the base of the pectoral fin, disappeared entirely
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 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.
Dentalium, as seen in longitudinal section (except the foot): S, shell, Mt, mantle; Sa, shell muscle; Mh, mantle-cavity; F, foot, Mk, cephalic prominence or oral cone; T, capfacula; R, radula; D, intestine; l, liver, Af, anus; G, cerebral ganglion; N, kidney; Ge, generative gland
Interior of the Rata Forest of the Auckland Islands, showing tanble of branches
Here the usually dense undergrowth is almost wanting, except for a few ferns
On the Cowichan River.
"My wife and I ran all the rapids of this river, except two, in the canoe with the Indians."
Paralichthys. Group of Paralichthys on a white background containing considerable debris scattered over it. All of the specimens are albiguttus except the large one above and to the left, which is dentalus. Note that this specimen has five dark areas, two rather inconspicuous ones near the head and three near the posterior end. In some specimens there are several others nearly as conspicuous as these. In albiguttus there are but three, the two near the posterior end of the base of the fin being absent. The difference in shade in the different individuals is largely due to difference in their past experience
Solea vulgaris : Body cavity of the male Common Sole after all the viscera have been removed except the testes and kidneys, which are left in situ.... The wooden rod passes through the anus, the black bristle passes into the urinary bladder, which lies beneath the cords containing the testicular ducts
Solea vulgaris : Body cavity of the female Common Sole after all the viscera have been removed except the ovary and kidneys, which are lift in situ. The wooden rod passes through the anus, the blue probe pass through the external aperture of the common oviduct up into the left ovary, the black bristle passes into the urinary bladder which lies beneath the oviduct
Deep-Sea Hermit-Lobsters, with Dull, Lack-Lustre Eyes
Munidopsis triaena, from off the Andamans, 575 fathoms. The figure represents a natural posture, except that the small fifth pair of legs should be tucked up out of sight
Paralichthys. Group of Paralichthys on a white background containing considerable debris scattered over it. All of the specimens are albiguttus except the large one above and to the left, which is dentalus. Note that this specimen has five dark areas, two
Waterweek (Philotria canadensis)
Found nearly throughout North America, except extreme north (After Britton & Brown)
Cat-tail (Typha latifolia)
Found in marshes throughout North America, except in extreme north. Also in Europe and Asia (After Britton & Brown)
Needle spike-rush (Eleocharis avicularis)
Found in wet soil throughout North America, except in extreme north. Also in Europe and Asia (After Britton & Brown)
Hornword (Ceratophyllum demersum)
Found in ponds and slow streams throughout North America, except extreme north. (After Britton & Brown)
Hornwort (Ceratophyllum demersum)
Found in ponds and slow streams throughout North America, except extreme north. This plant is shallow-rooted, deriving most of its sustenance from the water. Will thrive in cold spring water.
Trout Caught from a Lake Which Contained No Fish Except Those Planted by the Fisheries Department
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