1864.] PROF. HUXLEY ON ARCTOCEBUS CALABARENSIS. 333 
it exhibits but a single papilla. The ureters open into the bladder 
about half an inch above its urethral aperture, and 2 inches from its 
summit. The bladder is, thus, in its empty and flaccid condition 
about 2°5 inches long. 
The suprarenal bodies (SR) are oval, 0-4 inch long, and are at- 
tached to the front and upper faces of the kidneys. 
The testes (fig. 11, T) are large for the size of the animal, each being 
0°7 inch long by 0°4 inch wide, without the epididymis, which is 
proportionately developed. The inguinal canal is open, so that a 
blowpipe can be passed into it and the peritoneal sac inflated. The 
thick vasa deferentia pass through it, and then curving over the ob- 
literated hypogastric arteries (which can be traced up to the summit 
of the bladder), they bend down behind the bladder and become 
closely connected together. They terminate in the urethra by two 
apertures placed close together, upon the end and rather the under 
surface of a papilla-like colliculus seminalis, which is slightly bifid 
at its extremity (fig. 12, B). 
At first, I took the notch which causes this appearance for the 
mouth of an uterus masculinus, which I imagined might lie on the 
elevated ridge which extends between the apertures of the vasa defe- 
Fig. 12. 
The vasa deferentia, accessory generative glands and penis of the AngwaAntibo, dis- 
sected, and drawn of twice the natural size. A, viewed from behind ; B, from 
in front, and slit open; a, 4d, c, bristles introduced into the oval sac, vasa de- 
ferentia, and Cowper’s glands, respectively. In A: C. sp, the corpus spon- 
giosum; Pp, the prepuce; Ua, the urethral aperture. In B: Ur, the aper- 
tures of the ureters ; Pr’, of the prostate ducts ; Ua’, the urethral canal. 
