On apparently new Mammals. 185 



Fir/. 2. Inner face of tlie same arm with four suckers. Slightly enlaro-ed. 

 Fuj. 3. Horuy rim of a sucker, showing the arrangement of the sharp 

 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 diversicolor, 0. F. M., 7th December, 1906. X Zeiss 



oc. 2, obj. F. 

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

 Fiy. 3. Large corpuscles floating freely in the coelomic space, 21st January, 



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

 Fi(j. 4. Postlarval form of 23fch May, 1907, with three bristle-tufts (one 



rudimentary). 

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

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

 Fiy. 7. Postlarval form of 28th May with tiyebristle-bimdles. Magnified. 

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



Magnified. 



XXVIII. — Descriptions of apparently new •'Species and Sub- 



' species of Mammals belonging to the Fahiilies Lemuridse, 



Cebidffi, Callitrichidas, and Cercopithecidfe in the Collection 



of the Natural History Museum. Bj D. G. Elliot, D.Sc, 



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



Having for some time been engaged in the study of the 

 Primates, it was found necessary to investigate the material 

 contained in the various great museums in the Old World, 

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

 tained in the 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 that 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. Thomas for the opportunity, not only of examining 

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

 mammalogists the various forms that seemed worthy of 

 special recognition. 



Ann. & May. N. Hist. Ser. 7. Vul xx. 13 



