2l6 



ANIMAL BIOLOGY. 



[Part I. 



C. 



FIG. 68. BRAIN OF FROG. A. From above. B. From below. C. In longitudinal section. 

 olF. 



FIG. 69. BRAIN OF RABBIT. A. From below. B. In longitudinal section. 



C.ll 



Fio. 70. BRAIN OF PIGEON. A. From above. B. From below. C. In longitudinal section. 



a. c. Anterior commissure, c. ca. Corpus callosum. c. ce. Cruri cerebri. c. 7?. 

 Cerebral hemisphere, c. m. Corpus mnmmillare. c. . Corpus trapezoideum. cb. 

 Cerebellum. /. Fornix. /. m. Foramen of Monro. fl. Flocculus, inf. Infun- 

 dibulum. 1. t. Lamina terminalis. m. c. Middle commissure, m. o. Medulla 

 oblongata. net. Natis. olf. Oli'actory lobe. op. c. Optic commissure, op. ch. Optic 

 chiasma. op. I. Optic lobe. op. n. Optic nerve, op. tr. Optic tracts, p. c. 

 Posterior commissure, p. va. Pons Varollii. pn. yl. Pineal body. pit. Pituitary 

 body. te. Testis. th. Optic thalamus. v.p. Ventral pyramid, iii. Third ventricle, 

 iv. Fonrth ventricle, 



