286 Mr. J. E. Gray on sdme neio Mammalia, 



able any person to distinguish this very distinct and interest- 

 ing addition to the species of this useful genus. 



In the same paper in which I described the preceding species 

 there is the description of a new genus of otter from Demerara, 

 "^vhich is intermediate between the Lutra and Eriliydra" differ- 

 ing from both in the side of the tail being expanded into a slight 

 fin and in the large size of the fore and hind feet. In a late 

 number of Professor Wiegmann's Archiv, Part IV. 1838, he has 

 expressed a doubt if the genus is distinct from Enhydris, I have 

 therefore added to this paper a copy of a sketch (PL XIV.) of 

 the animal, which Mr. Gould was so kind as to make for me from 

 the original specimen at the meeting of the British Association 

 at Liverpool. I think that it will at once dispel M. Wiegmann's 

 doubt, for the tail is much longer (though it is represented 

 in the sketch rather too short for my measurement, taken from 

 the animal) and more slender, and the fore feet are much 

 larger, and the hind ones smaller than in the sea otter, which 

 induced me in the original description to observe, that the 

 hind feet are " intermediate in size between those of the otter 

 and the fin-shaped feet of the Enhydrce" 



In the Proceedings of the Zoological Society and in the 

 paper above referred to, I described an animal from the is- 

 land of the Indian Archipelago, from two specimens, one of 

 which was in Sir Stamford Raffles' collection, and one pur- 

 chased by the British Museum. Some time after this descrip- 

 tion, M. Blainville, in a paper in the e Annales des Sciences 

 Naturelles/ figured the skull of this animal under the name 

 of Viverra Carc7iarias; and more recently Dr. S. Muller 

 has published a description of it in his account of the animals 

 which he discovered in Borneo, and has formed for it a new 

 genus, which he calls Potamophilus barbatus. He says that 

 it is called Mampalon by the natives of Borneo, and that the 

 genus had not before been described. The name must how- 

 ever be changed, as it has already been used in zoology. 



While referring to the animals in the Surrey Zoological 

 Garden, I may remark, that on examining the eyes of Her- 

 pestes Smitkii, described in the paper above referred to, which 

 was lately in that collection, but which Mr. Cross, with the 

 desire which he has always shown of making his collection as 



