386 



PROECHINOMYS. 



404. semispinosus (Echimys!), Tomes, Proc. Zool. Soc., 1860, p. 265. 

 SHORT-SPINED RAT. 



Type locality. Ecuador. 



Geogr. Distr. Nicaragua south to Ecuador. 



Genl. Char. Size large; ears small; tail half as long as head and 

 body; long and strong claws on hands and feet; spines short, flexible, 

 confined to middle of back. 



Color. Above mixed reddish brown and black; cheeks, sides of 

 neck, and body paler; orbital ring black; under parts white; tail 

 above black, beneath ashy brown; hands and feet ashy brown. 



Measurements. Total length, 370-400; tail vertebrae, 140-169; 

 hind foot, 47-55; ear > 18-19. Skull: total length, 57; zygomatic 

 breadth, 29; upper tooth row, 16; length of nasals, 21. 



FIG. 72. PROECHINOMYS CENTRALIS. 

 No. 23252 U. S. Nat. Mus. Coll. Nat. size. 



405. centralis (Echinomys), Thomas, Ann. Mag. Nat. Hist., 6th Ser., 

 xvin, 1896, p. 312. 



