On a special Mountain Race of the Plantain Squirrel. 529 



Upper labials eight, the fourth and fifth entering the orbit. 

 Loreal nearly as high as long. The single anteocular just 

 reaches the vertical, which is nearly as large as an occipital, 

 very broad in front and narrow behind. Three postoculars. 

 Temporals 1 + 1, the posterior twice as large as the anterior. 

 Ventrals 195. Anal divided. Subcaudals 146. Entirely 

 black. 



Entire length 65 inches, of which the tail takes 20. 



Dendraspis Welwitschii, Gthr.* 



One specimen from Kavirondo; it differs somewliat in 

 coloration from the type; the skin between the scales is 

 black, but the scales themselves have no black tips ; tail and 

 hindmost part of the trunk bhick. 



Causus rhombeatus, Wagl. 

 Common at Kavirondo. 



EXPLANATION OF PLATE XXI. 



Fiff. A. Chameleon Ellioti. 



Fig. B. Chamcesaura tenuior (head). 



Fig. 0. Elapsoidea Guentheri. 



LXIV. — On a special Mountain Race of the Plantain Squirrel 

 from Mount Dulit, E. Sarawak. By Oldfield Thomas. 



During the past four or five years Mr. Charles Hose has 

 repeatedly drawn my attention to the difference in size and 

 general appearance presented by the specimens of Sciurus 

 7iotatus obtained on Mount Dulit above 3000 feet from 

 those got on the lowlands ; but I have hitherto not ventured 

 to describe them, on account of the known variability of the 

 members of this group. However, the entire identity with 

 each other of the five specimens taken at 3000 to 4000 feet, 

 and their great difference from all the lowland ones, induces 

 me now to describe the form, although the presence of one 

 specimen somewhat intermediate in character from an inter- 



* Of Dendraspis intermedia, Gthr., the British Museum has received 

 specimens from Kilili {G. D. Trevor Rope, Esq.) and from Tavita {Keith 

 Aiistruther, Esq.). 



