178 Mr. O. Thomas on new 
XX1.—New Mammals from Peru and Bolivia, with a List of 
those recorded from the Inambari River, Upper Madre de 
Dios. By OLDFIELD ‘THOMAS. 
Two further consignments have recently been received from 
that indefatigable and most successful collector Mr. Perry O. 
Simons, obtained in South-eastern Peru and the adjoining 
parts of Bolivia. Among other places, he was able to visit 
the Inambari River, whence a collection was recently sent to 
the New York Museum and reported on by Dr. J. A. Allen *. 
By adding Mr. Simons’s species and one or two of Mr. Kali- 
nowski’s to those recorded by Dr. Allen, I am able to give a 
complete list of the mammals as yet known to inhabit the 
district. 
To commence with, the following new species have to be 
described :— 
Cebus fatuellus peruanus, subsp. n. 
Like C. fatuellus, but with the “horns” scarcely deve- 
loped, all the coronal hairs being of nearly equal length and 
standing vertically upright, with the black cap scarcely 
reaching back on to the neck, and with the forearms of quite 
the same colour as the body, instead of having a yellowish 
patch on them. 
Dimensions of the type (as taken by the collector) :— 
Head and body 890 millim. ; tail 385. 
Skull: greatest length 91; basal length 62. 
Hab. Maycapata, Huaynapata, Inambari Valley, 8.E. Peru. 
Type. Female. B.M. 0. 11.5.2. Collected 23rd July, 
1897, by Mr. J. Kalinowski. ‘T'wo specimens examined. 
1 have taken as representing the true C. fatuellus an ex- 
cellent specimen in the Museum from Tolima, Colombia, that 
being the country selected by Schlegel as the typical locality 
for the species. 
In connexion with these Peruvian Cebz, it may be noted 
that at Idma, Sta. Ana, also in the Province of Cuzco, 
Mr. Kalinowski obtained four specimens of a Cebus which 
entirely agrees with Gray’s C. pallidus, first | said by him to 
be the same as C. eleyans, Geoff., but later { described as a 
species. ‘The co-types were bleached, and the following is 
a brief description of the fresh specimens :— 
General colour pale brown. Head-markings approxi- 
* Bull. Am. Mus. N. H. xiii. p. 219 (1900). 
Tt P. Z,S, 1865, p. 826. { Cat. Monkeys, p, 49 (1870). 
