. A manual of zoology. 5iS MANUAL OF ZOOLOGY sect. features are to be seen when a comparison is made with the pigeon. In the eye, the sclerotic is composed entirely of dense fibrous tissue ; the pecten is absent. In the ear the principal point of difference is in the special development of the cochlea. This part of the membranous labyrinth, instead of retaining the simple curved form which it pre- sents in the bird, is coiled on itself in a close spiral of two and a half turns. 7 ,.7,„ />• C&' "-I'. r - 7 /- \; inSj>tii\ r Fig. 3
. A manual of zoology. 5iS MANUAL OF ZOOLOGY sect. features are to be seen when a comparison is made with the pigeon. In the eye, the sclerotic is composed entirely of dense fibrous tissue ; the pecten is absent. In the ear the principal point of difference is in the special development of the cochlea. This part of the membranous labyrinth, instead of retaining the simple curved form which it pre- sents in the bird, is coiled on itself in a close spiral of two and a half turns. 7 ,.7,„ />• C&' "-I'. r - 7 /- \; inSj>tii\ r Fig. 311. — LepUS cuniculus. Longitudinal vertical section of the brain (nat. size). Letters as in the preceding figure; in addition, co, cerebellum, showing arbor vita;; c. c, cms cerebri; ck1, parencephalon ; ck-, temporal lobe; c. ma, corpus mammillare; f. m, foramen of Monro; in/, infundibulum; ly, lyra; m. 0, me- dulla oblongata; o. ck, optic cbiasma; olf, olfactory lobe; pty, pituitary body; vl. rfi, velum interpositum; v. vn, valve of Vieussens; //, optic nerve. (From Parker's Zootomy.) The special features of the middle ear with its auditory ossicles have been already referred to. The kidneys are of somewhat compressed oval shape, with a notch or hilus on the inner side. They are in close contact with the dorsal wall of the abdominal cavity, the right being somewhat in advance of the left. Towards the hilus the tubules of the kidney converge to open into a wide chamber, the pelvis, which forms the dilated commencement of the ureter. When the kidney is cut. 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 Parker, T. Jeffery (Thomas Jeffery), 1850-1897; Haswell, William A. (William Aitcheson), 1854-1925. New York, The Macmillan Company; London, Macmillan & Co. ,Ltd.
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Keywords: ., bookcentury1900, bookdecade1900, bookpublishernewyo, bookyear1900
