50 Ml{. U. I. POCOCK ox THE EXTIillXAL 



with the orifice of the vulva at its base and that of the urethra 

 about one-third of the distance from the tip — much lower, that 

 is to say, than in L. varius. The urinary channel runs from the 

 urethral orifice to the apex of the clitoris. The orifice of the 

 vulva is bounded on each side by a pair of thick labia, which, 

 when separated, diverge from above that orifice and inferiorly 

 disappear in the area of naked integument from which the 

 clitoris rises (text-fig. 15, A). 



In L. macaco, alhifrons, fidvus, mongoz, rufiventer, and coro- 

 natits, the clitoris is narrow, elongated, attenuated towards the 

 apex, and arises from an area of naked or nearly naked skin. It 

 is channelled to the apex from the orifice of the urethra, which 

 opens a short distance below that of the vagina. It varies to m. 

 certain extent in length within specific limits, e. g. L. alhifrons, 

 and is rather exceptionally long, less attenuated and narrower 

 at the base in L. coronatus than in the others. Moreover, in the 

 single example of this species examined, two pairs of elongated 

 lamina?, constituting labia, div^erged obliquely just below the 

 orifice of the vagina (text-tigs. 12, C ; 15, E, F, G). 



In the Asiatic Lemaroids the clitoris differs from that of the 

 Madfigascar forms in Ijeing traversed by the urethra which opens 

 at its tip. 



In Galago crass ic(tiidat as the clitoris is elongated, thick from 

 before backwards in profile view, and parallel-sided and com- 

 pressed from the posterior aspect : at its tip there is a depression, 

 probably glandular, almost encircling the urethral orifice, and 

 comparable to the similarly situated gland in the Indrisidse. 

 The vulva consists of two turgid labia, of which the opposed 

 surfaces are provided with several small fine laminae, running 

 from the edges of the labia inwards towards the orifice of the 

 vagina (text-fig. 16, C, D, E). 



In Ilemigalago the clitoris is relatively much longer and 

 thinner than in G. crassicaudata. The distal portion appears to 

 be strengthened by a baculum and the tip is pi'ovided with a 

 glandular depression encircling the end of the bone. The two 

 labia at the sides of the orifice of the vagina are relatively 

 smaller than in G. crassicaudatus (text-fig. 16, B). 



In Nycticehus the clitoris is short and thick, resembling the 

 prepuce of a penis. There is a glandular depression at the tip. 

 The orifice of the vagina is a wide transverse rima just at the 

 base of the clitoris. The general appearance of the external 

 genitalia is very different from that of Galago and Hemigalago. 

 Possibly the specimen examined was a virgin female. 



The female external genitalia of Tarsias are unlike those of 

 the Asiatic and Masearene Lemurs, but in the single example 

 examined recall rather those of the Old World pithecoid Primates. 

 The vulva is a laterally compressed, elongated excrescence, with- 

 out pendulous apex. The rima is short and bounded by a pair 

 of labia concealinsf the small clitoris and the orifices of the 



