Lemurs of the Hapalemur Group. 351 



type-specimen also tlie angle of tlie mandible is less rounded 

 and tlie upper end of the coronoid is thinner, longei', and less 

 curved than shown in Sciilegel's figure. 



The specimen described by Schlegel as //. griseus was 

 discovered by Pollen at Ambassuana, three days' journey 

 from the north-west coast of Madagascar. If, as I suspect, 

 the tjpe of H, schlegeli belongs to the same species, it 

 probably came from the north-west coast of Madagascar, 

 possibly also from Ambassuana. 



The Arm-glands <?/ Hapalemur. 



The presence of glands on the forearm in Hapalemur 

 griseus — or, rather, olivaceus, for such one of the specimens 

 ))roves to be — was first pointed out by Beddard, who also 

 ascertained, from Jentink and Milne-Edwards., that no such 

 glands are developed in Prolemur simus. This character 

 alone is sufficient, in my opinion, for generic separation of 

 the two species. 



In the two male specimens of H. olivaceus^ in which he 

 described the glands, he pointed out that the naked tract of 

 «kin above the wrist was covered with long and coarse 

 paj)ill£e ; but, judging from his figures, the papillte were much 

 better developed in the first specimen examined than in the 

 second. 



In the two other skins in the Society^s collection, which 

 Beddard did not see — namely, the small one received Nov. 10, 

 1887, and the adult received June 9th, 1903, — the gland 

 differs in that the tract of integument is comparatively 

 smooth, being merely roughened, so far as can be judged on 

 the dried skin, with fine granular papilla3. 



With regard to the glands on the upper arm, regarded by 

 Beddard (but, I thiidc, wrongly) as mammae, I can find no trace 

 of them in the small and presumably immature skin ; and in 

 the adult skin with the glandular tract of the forearm nearly 

 smooth they are less well developed than in the specimen in 

 which they were first detected — namely, the one with the 

 glandular area of the forearm exceedingly coarsely papillate. 



I do not think any special importance should be attached 

 to these differences, because in Lemur catta, which possesses 

 similar glands, the spur on the glandular tract of the forearm, 

 which may be compared to the papillee in Hapalemur, varies 



* I have tlie dried skin of the example described by Beddard in 1884. 

 Of the second specimen described in P. Z. S. 1891, p. 449, and 1902, 

 p. 159, no history was given, and the skin was not preserved. Probably 

 it was olivaceus. 



