220 PROCEEDINGS OF TEE NATIONAL MUSEUM. vol. 58. 



p. 199, 1916. Mostly relating to Bolivia and the Amazons, but a few speci- 

 mens recorded from the Peruvian plateau. 



No specimens were obtained by Mr. Heller of the two rodents de- 

 scribed by Mr. Eaton, the osteologist of the party, on skulls found by 

 him in the Inca tombs of Machu Picchu during the 1912 expedition, 

 Ahrocoma ohlativa and Agauti thomasi;^ nor of Lagostomus crassus 

 described by myself in 1910 ^ on a skull found in the sand at Santa 

 Ana by Mr. Kalinowski. The first and third of these animals are in 

 all probability now completely extinct, judging by the fact that their 

 relatives are no longer found in this faunal area, but only far south 

 in Chile and Argentina. On the other hand, the second species, 

 which is closely allied to living Andean forms, will perhaps be found 

 still to exist in the neighborhood. 



Finally, I must express by acknowledgements to Miss Winifred 

 Davidson for the assistance she has given me in sorting, handling, 

 and labeling the large series of specimens, an assistance which has 

 materially eased the labor of preparing the present report. 



1. ATELES ATER F. Cnvier. 



Adult and young female, Nos. 194337 and 194339, Rio Comberciato 

 (3,000 feet). ' 



An adult specimen in the British Museum from Pachitea, deter- 

 mined by Doctor Eliot, is very similar to these. 



2. ALOUATTA SENICULUS Linnaeus. 



Three males and one female, Nos. 194349, 194352, 194353, and 

 194354, Rio Comberciato (2,000-3,000 feet). 



3. CEBUS UNICOLOR CUSCTNUS Thomas. 



Male and female, Nos. 194356 and 194357, Uvini, Rio Cosireni 

 (5,000 feet). 



[Female, No. 98.11.6.1. B. M., Callanga, Cuzco. O. ^arlepp. 

 Type.] 



These two specimens of the Cuzco Cebus agree in every detail with 

 the type and confirm its distinction as a local form. I accept for 

 the moment its relation with unicolor, as advocated by Doctor 

 Elliot, who appeared doubtful of its validity, owing to its being 

 based on a single example. Mr. Heller's specimens are therefore 

 of interest as tending to resolve the doubt in the matter. 



The greatest skull length of the male (not fully adult) is 95 mm.; 

 of the female (old) , 90 mm. 



iJIem. Conn. Acad., vol. 5, p. 87, 1916. 



2 Ann. and Mag. Nat. Hist, ser. 8, vol. 5, p. 246, 1910. 



