224 Mr. R. I. Pocock on the 
XXVIIL.— The Systematic Value of the Glans Penis in 
Macaque Monkeys. By R. I. Pocock, F.R.S. 
IN his paper on the anatomy of Macacus brunneus from Bhamo 
(Proc. Zool. Soc. 1872, pp. 203-212), Anderson, described 
and figured (p. 209) the penis, but apparently without being 
aware of the interest of the facts he recorded. 
The glans is represented as an exceedingly long narrow 
cone, gradually tapering distally, and nearly four times as 
long as its proximal width. It is covered with minute re- 
curved spicules. ‘lhe orifice is an elongated slit occupying 
the distal third of the lower side of the glans, and this side 
has a long angular excavation reaching from its proximal 
end, where it is widest, to the middle of the glans, where it is 
narrowest, the apex being separated from the proximal end 
of the urethral orifice by a narrow bridge of spicular epi- 
thelium. The proximal end of the glans is wider than the 
portion of the penis to which it is attached, and sharply 
marked off from it (fig. 1, H,G). Finally, the glans is 
strengthened by a baculum, which extends throughout its 
length and was described as curving downwards and forwards 
and to be exactly an inch long *. 
Although the monkey described by Anderson was imma- 
ture, it had cut all its permanent teeth except the last molars. 
It may be added that brunneus is regarded as a synonym of 
arctoides, Geoffr., the name by which the species was known 
until a few years ago. ‘The correct title, however, appears 
to be speciosus, Cuv. 
In 1919 the Zoological Society purchased an adult male 
example of A. speciosus, which was shipped from Calcutta, 
but was stated, no doubt correctly, to have come from Burma. 
It died in December 1920, thus giving me the opportunity to 
check Anderson’s description of the penis. 
In most particulars this organ agrees tolerably closely with 
that of the specimen examined by Anderson, but there is no 
deep notch in the middle of the underside of the proximal 
half of the glanst. ‘The glans is long, tapering, slightly 
upturned at the end, which is bent a little to the left. It is 
everywhere roughened with recurved spicules, and is capable 
of being bent on the basal portion of the penis at a cousiderable 
* The woodcuts from which this description of the penis has been 
taken are indifferent figures. 
+ I can make no suggestion as to the significance of this discrepancy, 
unless two species are involved. In that case 1 do not know which, if 
either, should take the name speciosus. 
