. An elementary course of practical zoology. Zoology. 28 THE FROG CHAP. which lies a white rod, made of the same soft, pulpy sub- stance as the nerves, and called the spinal cord (Fig. 6, sp. cd), which ends behind in a thread-like prolongation (/ t), some distance in front of the thighs. It will also be found that the neural canal is continued, with a • slightly olfl. \ crbJv. I. dien \ optl. \ cbbw J "dbl tLSt. Fig. 6.—Dissection of a Frog in which the entire neural canal has been opened from above, and the brain (ir) and spinal cord (s^. cd) laid bare. The brain consists of olfactory l
. An elementary course of practical zoology. Zoology. 28 THE FROG CHAP. which lies a white rod, made of the same soft, pulpy sub- stance as the nerves, and called the spinal cord (Fig. 6, sp. cd), which ends behind in a thread-like prolongation (/ t), some distance in front of the thighs. It will also be found that the neural canal is continued, with a • slightly olfl. \ crbJv. I. dien \ optl. \ cbbw J "dbl tLSt. Fig. 6.—Dissection of a Frog in which the entire neural canal has been opened from above, and the brain (ir) and spinal cord (s^. cd) laid bare. The brain consists of olfactory lobes iol/'. I), cerebral hemL<:pheres {crb. A), diencephalon (difn), optic lobes ip^t. /), cerebellum (cblm\ and medulla oblongata (jned. obi), which will be referred to in Chapter X. The spinal cord ends in a delicate prolonga- tion, the filum terminale C/I /). The nasal bones (no), eyes {e), auditory re^on of the skull (aw), transverse processes of the nine vertebrae {v. t—v. 9), urostyle (w. st) and ilia (it) are indicated in outline, and serve as landmarks. ("After Howes, slightly altered.) increased diameter, into the skull, and that the spinal cord becomes continuous with the brain (br\ a complex organ formed of several parts, which will be referred to hereafter. Geaeral Structure of tlie Limbs.—A transverse section. 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; Parker, William Newton, joint author. London, Macmillan and Co. , Limited; New York, The Macmillan Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1900
