On apparenthj new Mammals. 185 



F'uj. 2. Inner face of the same arm with four suckers. Slightly enlarged. 

 Fiy. 3. Iloruy rim of a sucker, showing the arrangement of the shai-p 

 teeth, usually on the distal margin of the rim. Enlarged. 



Plate VIII. 



Fig. 1. Masses of perivisceral corpuscles near the bases of the feet of 



Nereis diver aiculor, 0. F. M., 7th December, 1906. x Zeiss 



oc. 2, obj. F. 

 Fi(/. 2. Male eleaioiits. Similarly magnified. 

 Fig. 3. Large corpuscles floating freely in the ccelomic space, 21st January, 



1907. X Zeiss oc. 2, obj. F. 

 Fiy. 4. Postlaryal form of 28th May, 1907, with three bristle-tufts (ono 



rudimentary). 

 Fiy. 5. Another of same date with three bristle-bundles. 

 Fiy. 6. Mandible of the foregoing, x Zeiss oc. 2, obj. 1). 

 Fiy. 7. Postlarval form of 28th May with tive bristle-bundles. Magnified, 

 Fiy. 8. Postlaryal form of 28th May with eight bristle-buudles. 



Magnified. 



XXVIII. — Descriptions of apparently new Species and Sub- 

 species of Mammals belonging to the Families Lemuridpe, 

 Cebidffi, CallitrichidiB, and Cercopithecidje in the Collection 

 of the Natural II istoru Museum. By D. G. Elliot, D.Sc, 

 F.R.S.E., &c. 



Having for some time been engaged in tlie study of the 

 Primates, it was found necessary to investigate tlie material 

 contained in the various great museums in the Old World, 

 and, beginning with tlie vast collection of the Primates con- 

 tained in tiie Natural History Museum, London, my friend 

 Mr. Oldfield Thomas, Curator of Mammalogy in that institu- 

 tion, not only most kindly gave me every facility for pursuing 

 my studies, but also requested that I would describe any 

 specimen tiiat I found in the collection that I considered 

 might be new. In various genera the Museum is very rich 

 both in number of species and examples, and the advantage 

 one possessed in working with such splendid material is 

 exemplified in the comparatively large number of new forms 

 contained in this paper. My thanks, therefore, are especially 

 due to Mr. Tiiomas for the opportunity, not only of examining 

 the great collection under his care, but of making known to 

 niatnmalogists the various forms that seemed worthy of 

 sj)ecial recognititdi. 



Ann. & Mag. iV. Hist. Ser. 7. Vol. xx. 13 



