NERVOUS SYSTEM . VKllTEBllATA. 



217 



D. 275. The brain of a Two-toed Sloth (C/iolospus didactylus) . 

 (Figs. 92 and 93 are not drawn from this specimen.) 



In most of its features this brain presents a most striking 

 resemblance to that of the Three-toed Sloth, But this 



Fig. 91. (Nat. size.) 



OLF.BULB. 



SULC.COR.L . 



SULC.SUPRAS 



Fig. 92. (Nat. size.) 



r. 



RHIN . F. 



PARAfLOC. D. 



OLF.BULB 



OLF.TR. 



OLF .TUBER. 



general similarity renders more remarkable the peculiar 

 absence of the so-called " Sylvian fissure " in this larger of 

 the two brains of the Family of Sloths. 



