21 -i 



PHYSIOLOGICAL SERIES, 



Armadillo and the arboreal herbivorous Sloth sufficiently 

 explain the i'act that the former is much more highly 

 inaero-matir than the latter. 



In the Sloth the noopallium is. in compari>on with that 

 of the Armadillo, very large, although it is considerably 

 smaller than that of Carnivore.- of the >ame size. It 



Fig. 



(X2.) 



CORP. CAL 



PSAL 



TELA 



HIP. VEST. 



Olf BULB 

 ..i''" 



AREA PRECOM'. 



CLF. TUBER. / 

 COMM. ANT, 



OPT.TR- / 



VENT, nr.' 



\ 



COMM. MOL. 

 PYR.L. 



Fig. 90. 



V.M:.. 



is moreover richly supplied with deep sulci, \vhieh eon- 

 form to a pattern curiously like that which prevails anion^ 

 the Carnivore. 



The cerebral hemispheres are sufficiently large to hide 

 the corpora quadrigemina and to overlap the cerebellum t<> 

 some slight extent ; it also partly overhangs the oll'aetoiy 

 hnlbs (fig. 87) but no olfactory sulcus is developed. 



On the ventral -nrface the posterior part of the pyriform 

 forrn^ a very pronounced protuberance, commonly 



