. A manual of zoology. Zoology. Fig. 54S. Fig. 549. Fio. 548.—Brain of trout (after Wiedersheim). BG, corpus striatum; CP, epiphy- sis; HH, cerebenum;io/, olfactory lobes; I\IH, optic lobes; NH, medulla oblongata; Pall, pallium, in part cut away; VH, cerebrum; I-XII, nerves. (See p. 471). Fig. 549.—Brain and nasal capsules of Scylllttm catuhis (from Wiedersheim). /r, fossa rhomboidalis; tr, olfactory tract. lens is very convex, almost conical, and the eye is very short-sighted because light is so absorbed by water that objects forty feet away are invisible. With this is connected the campanula
. A manual of zoology. Zoology. Fig. 54S. Fig. 549. Fio. 548.—Brain of trout (after Wiedersheim). BG, corpus striatum; CP, epiphy- sis; HH, cerebenum;io/, olfactory lobes; I\IH, optic lobes; NH, medulla oblongata; Pall, pallium, in part cut away; VH, cerebrum; I-XII, nerves. (See p. 471). Fig. 549.—Brain and nasal capsules of Scylllttm catuhis (from Wiedersheim). /r, fossa rhomboidalis; tr, olfactory tract. lens is very convex, almost conical, and the eye is very short-sighted because light is so absorbed by water that objects forty feet away are invisible. With this is connected the campanula Hallcri. The processus falciformis, a sickle- shaped outgrowth of the chorioid, from the entrance of the optic nerve into the vitreous body as far as the lens, swelling out into the campanula; this contains a muscle which draws back the lens and so is an apparatus of accom- modation. Chondrifications and ossifications of the sclera are common. Lids are weakly developed or absent, and only some elasmobranchs have a nictitating membrane. The ear has a relative size found in no other vertebrates, the labyrinth (fig. 532) has the sacculus and utriculus separated, the sacculus with a diverticulum, the lagena, the beginning of a cochlea. In the labyrinth of the teleosts there are two large otoliths. Experiments show that the ear is especially an organ of equilibration, and in some an organ of hearing to a limited extent. A few species have the power of making a noise, usually by the rubbing of parts on each other. Of all sense organs of the skin, the most noticeable are those of the lateral line, which occur elsewhere only in cyclostomes and aquatic amphibia. In fishes a line on either side usually begins at the tail and extends to the head, where. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hert
Size: 1257px × 1988px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectzoology, bookyear1912
