488 



COMPARATIVE PHYSIOLOGY. 



C 



Fig. 344.— A, C, the brain of a lizard (Psammosaurus Bertgalemis), and B, D, of a 

 bird {Meleagru gaUopavo, the turkey), drawn as if tliey were of equal lengths 

 (after Huxley). A, B, viewed from above; C, D, from the left side. «/, olfactory 

 lobes; Pn, pineal gland; Hmp, cerebral hemispheres; Mb, optic lobes of the mid- 

 bram; Cb, cerebellum; M. 0, medulla oblongata; ii, iv, vi, second fourth, and 

 sixth pairs of cerebral nerves; Py, pituitary body. 



Pig. 345. — Brains of a lizard (Ps(mwiosauru8 Bengalensis) and of a bird (Meleagris 

 gaUopava) in longitudinal and vertical section. The upper figure represents the 



