308 PHYSIOLOGICAL SERIES. 



Suborder PERISSODACTYLA. 



Family TAPIRIDAS. 



D. 394. The brain of an American Tapir (Tapirus terrestrii), ( ? ). 

 In this large and highly macrosmatic brain the typical 

 features of those parts of the cerebral hemispheres which 

 arc most intimately concerned with olfactory functions are 

 shown in an exceedingly clear manner. On the moial 

 surface (fig. 178) the large supracallosal vestiges of the 

 hippocampus may be distinctly seen in front of the genu 

 of the corpus callosum passing into continuity with the 



Fig. 178. (xf.) 



SULCI. SUBCING. 



SULC.INTERCAL 



SULC.G.N.. ' ^ U-3ULC.CALC. 



OLF.PED. 



precommissural area and the olfactory peduncle. Pos- 

 teriorly they are prolonged into an enormous subsplrnial 

 hippocampal tlexure, the limits and subdivisions of which 

 are demonfltated in an unusually clear manner. The lar^e 

 llump anterior portion (fascia dentata) is distinctly marked 

 oflF from the posterior portion (hippocampus nudus) by a 

 definite sulcus ; and the latter is separated from the neo- 

 |>allium by an equally distinct groove or "sulcii< limitan-." 

 The structure which I have called " hippocampus nudus n 

 is merely an exposed part of the hippocampus, and is 

 variously known as " Balkenwindung " (Zuckerkandl) and 

 "gyms Andre;e Het/ii " (Gust^iv Uct/ius). 





