348 Mr. II. I. Pocock on the 



Schlegel's figure, and that tlie possibility ol: anotlier species 

 beinf concerned dawned upon hlin. Nevertheless, the short- 

 ness of the muzzle misled him apparently in the matter of its 

 apparent superior width. 



Both the literature, therefore, and the skulls in my 

 possession attest the existence of two well-marked species of 

 Jiapalemur — one exemplified by the small skull above referred 

 to, which probably belongs to the form Schlegel identified as 

 H. griseus^ the other being the true r/riseus of Geof^roy, wiiich 

 lias been well figured by Milne-Edwards and Grandidier. 

 The former species I propose to describe as new, taking the 

 skull in the Zoological Society's collection as the type. 8ince 

 the only other skull I have at hand is that of the specimen 

 determined, for reasons already stated, as olivaceus, I have 

 diagnosed the new species with special reference to olivaceus 

 rather than to griseus, although the differences between it and 

 Milne-Edwards's figure of the skull of griseus are almost as 

 well marked. - 



Tlapahmur scMegeli, sp. n. 



r" Ilapaletnur griseus, Sclilegel, in Pollen & Van Dam, Rech. Faune de 

 Madag-., Manim. et Ois. p. 6, pi. vii. tigs. 4 a-d (sliuU). Nee H. gri- 

 seus, Is. Geoff. 



Bkuli (type) considerably shorter but relatively bioader^ 

 higher, and more arched antero-posteriorly along its upper 

 profile, and less hollowed between the postorbital processes, 

 than in H. olivaceus, the orbits relatively larger, with the 

 inferior edge much more salient, giving a strongly sinuous 

 curvature to the outline of the malar arch, and causing a 

 deeper groove along the outer surface of its suborbital 

 portion ; the up})er surface of the muzzle more depressed and 

 curved, the upper portion of the maxilla compressed along 

 the nasal suture, the lateral edge of the anterior nares emar- 

 ginate in profile view, this orifice slightly higher than wide, 

 compressed above. In IJ. oUcactus the muzzle and anterior 

 nares are not compressed above and the latter orifice is slightly 

 Avider than high. The zygomatic arch and postorbital bar 

 are relatively stouter than in olivaceus ; the mastoid is intlated, 

 reducing the paroccipital process, and the u])per edge of the 

 zygoma is not continued as a crest back to tlie occiput as it 

 is in //. olivaceus, where the mastoid is not inflated but flat, 

 leaving the paroccipital processes salient. The basicranial 

 axis is more steeply inclined, so that the bullae and occipital 

 condyles are set considerably lower with reference to the 

 alveolar border of the maxilla than in olivaceus*. 



* This diiFerence is not so marked between the skulls of H. schhgeli 

 and H, griseus, judging from M.-Edwards's figure of the latter. 



