ERETHIZON. 



COENDU. 



399 



FIG. LIV. ERETHIZON EPIXANTHUM. WESTERN PORCUPINE. 



Measurements. Total length, 825; tail vertebrae, 165. Skull: 

 occipito-nasal length, 92; Hensel, 81; greatest zygomatic width, 70; 

 mastoid breadth, 47 ; palatal length, 30 ; length of upper tooth row, 24. 



The members of the genus COENDU are essentially Tree Porcupines 

 having prehensile tails to aid them in their movements among the 

 branches. They are more especially natives of South America, but 

 one extends its range into Mexico. They are of a more slender form 

 than the Ground Porcupines, and their quills are variously colored, 

 and these are mixed among the hairs, exhibiting the transition 

 stage, neither all hairs nor all quills. 



8O. Coeiidu. Short-spiiied Porcupines. 



Coendu Lace"p., Disc, d'ouvert. et de cloture du Cours Hist. Nat., 



Suppl., 1799, p. n. Type Hystrix prehensilis Linnaeus. 

 Senetheres (sic') F. Cuv., Me"m. du Mus. Hist. Nat.. Paris, ix, 

 1822, p. 433. 



