CHARACTERS OF THE LEMURS AND TARSIUS. 



49 



the orifice of the urethra, which is just below that of the vulva ; 

 bvat in a virgin female the two orifices are concealed by a flap of 

 membrane (Jiymen), below the edge of which the open channel 

 extends, narrowing in its course to the apex of the clitoris. The 

 sides of the clitoris are marked by a couple of deep, probably 

 glandular, grooves (text-fig. 15, B, C, D), 



III Lemur catta the clitoris is a thick elongated excrescence 



Text-figure 16. 



A. Anal and genital area of male CliirngaJeus major, showing the position of the 



anus on the root of the tail. 



B. The same of female Semigalago demidoffi, showing the long pendulous clitoris 



below the vulva. 



C. The same of female Grolago crassicaudatus with the labia of the vulva spread 



open. 



D. Vulva of the same with the labia closed. 



E. Vulva of the same from the side. 



F. Anal and genital area of female Tavsius, showing the labia of the vulva 



partially spread open. 



G. The same from the side with the labia closed. 



ch, clitoris; I., labium of vulva ; ?(., orifice of urethra ; v., orifice of vagina. 



Proc. Zool. See— 1918, No. IV. 4 



