On a new Species of Bassaricyon. 229 
M. inuus differs generically from irus, rhesus, and nemestrinus, 
I provisionally, and quite without prejudice, retain the name 
Macaca for those forms, 
By the structure of the glans penis, then, the genera of 
macaques above discussed may be distinguished as follows :— 
a. Penis with the glans very long and tapering, and 
strengthened by a baculum of corresponding 
levgth ; the urethral orifice inferior, in the middle 
line beneath the apex of the baculum .......... Genus Lyssodes, 
a’. Penis with the glans short, rounded, subovate or 
piriform, supported by a short baculum; the 
urethral orifice a vertical terminal slit, slightly 
eccentric and opening to the right of the apex of 
the baculum. 
6. Posterior border of upper surface of glans forming 
a transverse crescentically curved thickening, 
without median notch ......, seein </Hane eA mS Genus Zati. 
b', Posterior border of upper surface of glans un- 
thickened, but mesially notched ............ Genus Macaca. 
The glans penis of A. cnuus, the type of the genus Macaca, 
is of the kind stated above under that heading. This was 
long ago pointed out by Daubenton (see Buffon and Dauben- 
ton, Mammiféres, v. p. 95, 1830 ; Planches, iv. pl. cecexv. 
fig. 1, 1833), who described some points in the anatomy of 
that species, which he called “ le Magot.” 
A fact of interest to be noted is that whereas the adult 
males of Macaca irus and Zati sinicus are not very unequal in 
size, there is an enormous difference in the relative size of 
the penis. 
XXIX.—A new Species of Bassaricyon. 
By R. I. Pocock, F.R.S. 
THe following species of the rare genus Bassaricyon have 
been described, their arrangement, in accordance with their 
distribution from north to south, being as follows :— 
B. richardsoni, Allen, Bull. Amer. Mus. Nat. Hist. xxiv. 
pp. 662-668, figs. 5, 7, 9, 11 (1908). 
From Rio Grande, Nicaragua. 
B. gabbi, Allen, Proc. Acad. Nat. Sci. Philad. 1876, pp. 20- 
23, pl. i.; id. Bull. Amer. Mus. Nat. Hist. xxiv. pp. 662- 
668, figs. 6, 8, 10, 12 (1908). 
From Talamanca and Chiriqui in Costa Rica. 
