2S/i 



—Sped 



ClfZ 



w zxx 

 Cpt.ch inf , i 



J m pa v 

 Cer.H fcrAf cpl v ^ ch Lv2 



1 €cm pmCcml / 



A fed. cbl 



1 iy )>u 



FIG. 83. — Brain of frog. A, dorsal side; B, ventral side; C, left side; D, in vertical 

 longitudinal section through the middle. Cb, cerebel lum ; Lcr.H, cerebral hemispheres ; 

 ch.plx^ anterior, and ch.plx- posterior, choroid plexus; com, commissures connecting 

 the right and left halves of the brain; Cr.C, crura cerebri; Di, diencephalon, or thala- 

 mencephalon; for. M, foramen of Monro; i, iter, or aqueduct of Svlvius ; inr, infun- 

 dibulum; Med.obl, medulla oblongata; Olf.I, olfactory l obe; ()//./,' optic lobe ; opl.v\ 

 optic vesicle; pin, pineal body; pit, pituitary bodv ; Sp.cd. spinal cord; z$, third ven- 

 tricle; v*, fourth ventricle; l-X, cranial nerves;' / Sp, 2 Sp, first and second spinal 

 nerves. (From Parker and Parker's Zo8logv, after Gaupp and Osborn.) 



2y2 



