from Tropical Africa. 525 



from the temporal crest to the root of the tail. Sometimes 

 one or two whitish bauds across the lower part of the temple. 



In the females the crests on the head are lower. 



A male measures 152 millim., the tail taking 75 millim. ; 

 a mature female witli fully developed ova is 102 millim., the 

 tail taking 47 millim. 



The female of C. bitceniatus is very similar to that of the 

 present species, but distinguished by much larger tubercles ; 

 but the male of G. bikeniatus differs greatly in having a very 

 high occipital crest, covered with large scutes, and the extre- 

 mity of the snout raised into a knob. 



Grayia Smt/thii, Leach (?). 



Only the head and tail of a specimen from Uganda have 

 been preserved ; they show no structural difference from 

 West-African specimens, but the coloration is peculiar ; the 

 parts are black, the head-shields and scales of the neck being 

 finely mottled with salmon-colour. 



Leptodira rufescens^ Gm.* 

 From the foot of Ruwenzori. 



Boodon lineatus, var. biproiocularis, Gthr. 

 Uganda, alt. 3900-4500 feet. 



Elapsoidea Guentheri^ Bocage. (PI. XXI. fig. C.) 



Two specimens were obtained. One on the lower slope of 

 lluwenzori ; it is half-grown and agrees perfectly w^th an 

 adult specimen from Stanley Pool belonging to the variety 

 figured by Bocage and described by him as var. C. Being of 

 immature age, it has the abdomen of a darker colour. 



The second specimen (see figure) is quite young and was 

 obtained in the Shire Highlands. It is deep black above and 

 below, with ten narrow white rings on the trunk, not reaching 

 across the abdomen, and two on the tail. Evidently these 

 rings disappear with age, leaving their traces merely as the 

 paired faint whitish lines observed in adult specimens of 



* Coronella cana, L. 



This common South-African snake extends as far northwards as 

 Zomba ; but the single specimen (adult) (which was collected by 

 Mr. Alex. Whyte) presents a singular coloration. Each scale is black, the 

 greater portion of it being occupied by a yellow spot ; these spots vary 

 in their extent and position, producing thereby the appearance of an 

 irregular network of black lines. Scales in 27 series. 



