THE GREAT ANTEATER. 



301 



figures of the cranial casts of Myrmecophaga, and, in the article in the 

 ' Journal de 1'Anatomie ' above cited, representations of the brain itself 

 of Tamandua and Cycloturus, that organ having been previously figured 

 in the latter species by Tiedemann *. 



As I find Gervais's figures of the brain in some respects unsatisfactory, 

 I have taken this opportunity of giving representations of the brains ex- 

 Fig. 3. 



jr 



P. Z. S. 1882, 

 p. 293. 



Brain, from the side, of specimen d. 

 Fig. 4. 



The same, from the inside. All these figures are of the natural size. 



a, Limbic fissure (inferior arc of Broca) ; b, fissure of Rolando (Broca) ; c, primary 

 parietal sulcus ; d, e, additional sulci of circumsylvian gyrus ; s, fissure of Sylvius ; 

 l.s.s, island of Reil (lobule sous-sylvien, Broca) ; c.m, c.m', c.m'', calloso -marginal 

 sulcus (superior arc of limbic fissure, Broca); h, hippocampal sulcus; a.c, an- 

 terior commissure ; opt, optic nerve ; r.l (fig. 4), " Pli de passage retro-limbique " 

 (Broca) ; -f (fig. 2), bridging convolution between frontal and parietal lobes. 



tracted from my two specimens, including one showing the disposition P. Z. S. 1882, 

 of the deeper parts (figs. 2, 3, 4). 



The olfactory lobes are very large, projecting forwards for -7 inch in 



* Icones cerebri Simiarum, pi. v. fig. 8. 



p. 291. 



