236 



PHYSIOLOGICAL SEl;il>. 



In general appearance and in the arrangement of the 

 horifOnte] rliinal fissure and it- relation to the orbital sulcus, 

 tli- lirain presents some resemblance to that of an Ungulate. 

 I ut the poor development of the stiprasylvian sulcus i> a 

 point in which it differs markedly from the Ungulata. The 

 cerebellum also differs most markedly from the simple. 

 transversely-foliate, Ungulate type. 



There is a peculiar feature in the lower extremity of the 

 hippocampal formation a hippocampal tubercle, which is 



Fig. 115. (x.) 



OLF. BULB. 



....OLF. FED. 



_..OLF. TUBER. 



OLF. TR 



L ..VALL.5YL 



MEO.OBL. 



not exposed in either ,f these specimen-. Such ;i rt hippo- 

 campal tubercle" of inverted hippocampus I have seen 

 elsewhere only in one of three specimens of the Manatee 

 ami in the Primates. 



I also in-ert here a drjiwing (made from a hotter >poci- 



men) of the ba>e of the brain, because it exhibits in Mich a 



.-triking manner the tyjioal relations of the highly macros- 



matic brain (fig. 115). 0. C. 1323 L. 



Presented by the Zoological Soc.ii-ii/. 



Elliot Smith, Trans. Linn. Soc. vol. vii. 1899, p. 286, 



