88 ME. B. LYDEKKEB ON A NEW [Feb. 19, 



forwarded to Prof. Ewart a piece of the skin of E. johnstoni, 

 were read : — 



"I have compared the hair from the piece of skin you kindly 

 sent with the hair of antelopes, oxen, deer, and other Ruminants, 

 and with the hair of zebras and other Equidae. 



" The conclusion arrived at is that the pieces of skin sent home 

 by Sir Harry Johnston belong to a Zebra. 



" In all tiie Equidae the hair has the same general structure, but 

 yet it is possible to distinguish zebra-hair from that of the horse 

 and the ass. In wild asses even the light hairs are longitudinally 

 striped, in zebras only the coloured hairs are sti'iped, while in horses 

 neither the light nor the dark hairs show any stripings. In being 

 striped the hairs from the Congo skin differ from the hairs of 

 autelopes, and agree with those of the asses and zebras. As in the 

 Congo skin the white hairs show no longitudinal striping, it may 

 be assumed it belongs to a zebra rather than to one of the asses. 

 To which of the known zebras does the Congo one most closely 

 resemble ? 



"Judging by the hairs on the piece of skin sent it decidedly differs 

 from the Quagga (Equus quagga), the Mountain Zebra (E. zebra), 

 and the Burchell's Zebras (E. burchelli) of East and South Africa." , 



The following papers were read : — 



] . Notice of an apparently new Estuarine Dolphin from 

 Borneo. By R. Lydekker. 



[Eeceived January 17, 1901.] 



(Plate VIII.) 



(Text-figure 11.) 



The skin and skeleton of a female Dolphin from Borneo, recently 

 purchased by the British Museum from Mr. E. Hose, do not accord 

 with the description of any species with which I am acquainted, 

 and therefore seem to indicate a new form. The specimen was 

 obtained at Sipaug, on the mouth of the Sarawak Eiver. 



The total length of the skin is approximately oh feet. The beak 

 is comparatively long and narrow, and at the base the forehead 

 rises very abruptly, showing a distinct prominence or boss some 

 distance in advance of the blow-hole. The flippers are falcate, 

 but the dorsal fin is obtuse, low, and continued both in front and 

 behind as a low ridge extending for a length oF about fourteen 

 inches along the back. 



The general colour of the upper-parts is blackish ; but the under- 

 parts are much mottled with a light tint, which is yellow in the 

 dried state, but during life was probably buffish white or whitish. 

 Nearly the whole of the chin is of this light tint, and there are 

 patches of it at the roots of the flippers ; in the hinder half of the 

 body and tail it extends some way up the sides. 



