ON THE UAKATU MONKEYS, 



115 



lobe, helps in large part, on this side, to form a shallow cystic fossa. A 



second similar, but smaller, partly free lobule is also developed by the P. Z. S. 1880, 



left lateral lobe at its antero-internal angle, The vena cava inferior is 



almost entirely bridged over by hepatic tissue between the Spigelian and 



caudate lobes. The development or otherwise of this bridge, however, is 



an unimportant feature in the liver of the Primates, and is largely an 



individual structure. 



On the whole, this liver of Brachyurus rubicundus more resembles 

 that of Gallithrios amicta in its structure and proportions than that of 

 any other species I am acquainted with, though I have not seen that of 

 Pithecia monachus *, which, judging from Prof. Flower's description t, 

 must much resemble that of Brachyurus. In two specimens I have by 



P.Z.S. 1880, 

 p. 637. 



The same, from below. 



E.G. Right central lobe. L.O. Left central lobe. E.L. Right lateral lobe, L.L. 

 Left lateral lobe. C. Caudate lobe. Sp. Spigelian lobe. u.f. Umbilical fissure. 

 r.l.f, U.f. Right and left lateral fissures. G.B. Gall-bladder. V.P. Vena porta. 

 V.H. Hepatic vein. V.C. Vena cava inferior, s.l. Suspensory ligament, l.r. 

 Ligamentum rotundum. 



* P.S. Jan. 27, 1881. The recent death of a specimen of this ppeoies allows me to 

 confirm the resemblance pf its liver to that of Brachyurus. 

 t P. Z. S. 1862, p. 332, and Med. Times, &o. s. c. p. 508. 



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