RACCOONS OF NORTH AND MIDDLE AMERICA 83 



breadth, 83.3; interorbital breadth, 25.7; least width of palatal shelf, 17.7; maxil- 

 lary tooth row (alveoli), 48.3; upper carnassial, crown length, 10.2, crown width, 11. 



Remarks. — Comparison of the Panama series and South American 

 material from various locahties, including a specimen from northern 

 Brazil assumed to be near typical P. c. cancrivorus of Cayenne, and 

 the type and two topotypes of P. c. proteus, of northern Colombia, indi- 

 cates that the Panama animal is a well-marked geographic race. The 

 close agreement in dentition and the other essential characters, how- 

 ever, point to probable intergradation of all forms of cancrivorus. P. 

 c. panamensis overlaps the range of Procyon lotor pumilus in Panama 

 where both occur at the same localities, but may readily be distin- 

 guished by the reversed pelage of the nape, absence of underfur, and 

 the blackish instead of grayish forearms and thighs. 



Specimens examined. — Total number, 7, as follows: 



Canal Zone: Gatun (type locality), 3. 



Costa Rica: Canas Gordo, l.<^ 



Panama: Boquete, 1 (skull only);*'^ Caua, 1; Porto Belle, 1. 



<' Amer. Mus. Nat. Hist. 

 « British Mus. (Nat. Hist.). 



