HAPALEMUR SIMUS. 49 



I, at least, wlieu I published, in 1876, my mono- 

 graphical review of the order of Siniiae , by the want of a 

 specimen of Hapalemur simus, did not deem it seasonable 

 to adopt this species. I saw , of course , myself obliged to 

 speak of the species in the folloAving terms (see my article 

 of Hapalemur griseus, 1. c. p. 316). 



» Hapalemur simus, Gray, Cat., p. 133; Pr. Z. S. L., 

 1870, p. 828, pi. 52: figure peu reconnaissable , mais que 

 Gray lui-même dit être identique avec celle du Hapalemur 

 griseus, publiee par nous dans la Faune de Madagascar. 

 Gray pretend , du reste , que le Hapalemur griseus du 

 Musee Britaunique appartient a une autre espèce. Je ne 

 comprends rien a cette distinction, vu que notre individu 

 figure dans la Faune de Madagascar ne diftere nullement 

 de I'individu type du Hap. griseus , cede par Is. Geoiïroy 

 a notre Musee, c'est notre N". 1." 



The fact of the matter is, that Gray, as is proved 

 by his Catalogue, at the time did not possess at all the 

 true Hapal. griseus, that he considered Hapal. olivaceus, 

 Is. Geoffr. which is a slight individual variety of Hapal. 

 griseus, as different, and that his specimen of Hapal. 

 simus , having lived for a considerable time in captivity , 

 had its hairs considerably damaged, and that the specimen 

 in general was rather in an unfavorable state. 



A. comparison between the two species of the subgenus 

 Hapalemur shows that they agree in form , proportions , in 

 the dentition , and in general colour of the fur , but that 

 they diifer widely from each other by the following 

 characteristics. 



Hapalemur simus is a considerably larger animal than 

 Hapalemur griseus, as will be shown by the comparative 

 measurements of the two species. It has the ears frino-ed 

 by greyish white hairs almost as long as the ears them- 

 selves, whereas the hairs bordering the ear of Hapalemur 

 griseus are not longer than in the other parts of these 

 organs. Another very conspicuous characteristic is presented by 

 a large spot of an uniform very pale yellowish rusty colour 



Notes from tlie Leyden IMusciim , Vol. II. 



4 



