114 



OJS T THE UAKARI MONKEYS. 



P.Z.S. 1880, 

 p. 636. 



central is markedly smaller, as is often the case in the Cebidae, than the 

 three others, u hich are here all very nearly equal. The left lateral lobe is 

 decidedly thin along its outer margin ; the other lobes are thick, and of 

 simple form ; the right lateral is much longer anterio-posteriorly than trans- 

 versely. The caudate is large and square ; on its visceral surface it is 

 marked by a conspicuous diagonal ridge running from the entrance of the 

 vena cava towards its postero- external angle. It develops two well-marked 

 though small fissures, but is otherwise simple. The right lateral lobe 

 appears internally to it, when viewed from below. The Spigelian is an 

 elongated, somewhat clavate thickening, which is not free, but is most de- 

 veloped on the left side. The umbilical fissure is well-marked, extending 

 for about one third of the total median depth of the liver. There is no trace 



Fig. 3. 



V.C.&YH 



V.C. 



Liver of Bed Uakari, from above. About natural size. 



P. Z. S. 1880, of a cystic notch ; and the gall-bladder, which is large, does not reach by 



p. 635. some little distance the anterior (free) margin of the liver. It lies very 



superficially, and, as in most of the CebidaB (though not in Cebus itself 



or in Ateles), lies very close to, and almost in, the umbilical fissure. 



An accessory lobule, developed at the internal angle of the left central 



