666 



Bulletin American Museum of Natural History. [Vol. XXIV, 



along the median dorsal area give a prevailing blackish tone to the coloration from 

 the forehead to the base of the tail; sides of body less varied with black, the prevail- 

 ing color being pale fulvous; ventral surface uniform pale yellow from the fore neck 

 to base of tail ; limbs externally like the sides of the body and internally like the 

 ventral surface; a patch below the ear, extending forward nearly. to the eye, like the 

 ventral surface; front of head anterior to the eyes, dull grayish brown, minutely 

 varied \vith black-tipped hairs; sides of nose and chin dusky brown, passing on the 

 throat into fulvous ; tail like the body pale fulvous, strongly varied on the median 

 line above with black-tipped hairs, forming a poorly denned blackish median line, 

 becoming blackish apically with the extreme tip nearly black. 



Total length, 950 mm.; tail vertebrae, 480; hind foot, 80 (collector's measure- 

 ments); hind foot with claws, 85. Skull, condylo-basal length, 80.5; basilar length, 

 73; palatal length, 45; zygomatic breadth, 53; interorbital breadth, 17; width 

 across orbital processes, 32; postorbital breadth, 17.5; breadth at base of canines, 

 17; mastoid breadth, 34.3; length of upper toothrow, excluding incisors, 28; molar 

 series, 12; lower jaw, length, 58; height at condyle, 11; height at coronoid process, 

 25.5; lower toothrow r , excluding incisors, 30; premolar-molar series, 25. 



The type of B. richardsoni is, so far as known to me, the sixth known 

 specimen of the genus Bassaricyon, which was originally based on a skull, 

 without skin, collected by the late Professor Wm. M. Gabb in Talamanca, 

 Costa Rica. 1 The second known specimen is the type of Bassaricyon alleni 



Fig. 11. 



Fig. 12. 



Fig. 11. Bassaricyon richardsoni. Same skull as shown in Figs. 5, 7, and 9. Nat. size. 

 Fig. 12. Bassaricyon gabbi. Same skull as shown in Figs. 6, 8, and 10. Nat. size, 



Thomas, from Sarayacu, Ecuador, collected by Mr. Clarence Buckley. 2 

 In 1883, M. Huet described and figured two specimens of Bassaricyon, 

 received at the Paris Museum of Natural History, from "Caimito, province 

 de Correo, au nord de Panama," an adult female and a young example 

 (last molar undeveloped). 3 These two specimens were described in great 



1 ' Description of a 

 By J. A. Allen. Proc. Acad. Nat. Sci 



...., of Procyonidae from Costa Rica, 

 1876. pp. 20-23, pi. i. What was erroneously 



new Generic Type (Bassaricyon) 

 cad. Nat. Sci. Phila., 1876. pp. 2 



supposed to be the skin belonging to this skull was subsequently described and figured (Proc. 

 Acad. Nat. Sci. Phila., 1877, pp. 267, 268, pi. ii), the mistake being fully explained later (Bull. 

 Geogr. and Geol. Surv. Terr., Vol. V, No. 2, Sept., 1879, p. 169). 



2 'On Mammals from Ecuador.' By Oldfield Thomas. Proc. Zool. Soc. London, 1880, 

 pp. 393-403, pi. xxxviii, text figs. 1-4. (B. alleni, pp. 397-400, figs. 1-4, pi. xxxviii.) 



5 'Note sur les Carnassiers du genre Bassaricyon.' Par M. Huet, Aide-Naturaliste. Nouv. 

 Arch, du Mus. d'Hist. Nat. de Paris, 2 s6r., Vol. V, 1883, pp. 1-12, pll. i-iii. 



