1900.] 



ME. F. E. BEDDABD ON BASSARICYON ALLENT. 



673 



On the dorsal aspect of the skull, the zygomatic arches are seen 

 to project more at the sides in Cercoleptes than in Bassaricyon. In 

 the latter, owing to the greater width and different curvature of 

 that part of the zygomatic arch which joins the skull anteriorly, 

 the infra-orbital foramen is visible on this view ; it is not in 

 Cercoleptes. 



The mandible is much slighter, not nearly so deep in proportion 

 to its length, in Bassaricyon. The symphysis, moreover, is con- 

 siderably longer in Cercoleptes. The lower border of the mandible 

 is curved convexly downwards in Bassaricyon ; it is nearly straight 

 and with a slight ventral concavity in Cercoleptes. The coronoid 

 process is much longer than the angular process in Bassaricyon ; the 

 two are about equal in Cercoleptes. 



The vertebral column of Bassaricyon has the following formula:. 



C. 7. D. 13. L. 7 ca. S. 3. Ca. 15 + 



It has thus one dorsal fewer than has Cercoleptes and one lumbar 

 more. Its formula is in fact the same as is that of Bassariscus. 



The atlas and the axis (cf. figs. 6 & 7) resemble those of the 

 Kinkajou; the third, fourth, and fifth cervicals show hardly any 



Fig. 6. 



Fig. 7. 



Cervical vertebrae of Bassaricyon 

 alleni, ventral view. 



Cervical vertebrae of Cercoleptes 

 caudivolvulus, ventral view. 



distinction between the lower and the upper lamellae of the 

 transverse processes ; this, however, is partly shown on the fifth, 

 and is very marked on the sixth. In Cercoleptes, on the other 

 hand, all these vertebrae have markedly bifid transverse processes, 

 while the lower lamella of the sixth vertebra is by no means so 



