l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 00 



legs and ankles all round deep, glossy black ; fore legs black or dark 

 brownish all round ; feet thinly clothed with short hairs varying from 

 brownish to grayish ; tail with seven or eight alternating black and 

 grayish or yellowish rings and a black tip, the proximal rings more 

 or less interrupted along median line below. 



Skull. — In general form closely resembling that of E. c. cancri- 

 vorus, but palate more elongated, lower surface of basioccipital more 

 convex, the lateral margins turning downward and partly covering 

 audital bullae ; nasals broader ; audital bullae broader, more inflated 

 posteriorly ; dentition about the same. Contrasted with that of E. c. 

 protcus, the skull differs in longer palate, and anteriorly broader, 

 posteriorly narrower nasals. 



Measurements. — Type : Total length, 950 millimeters ; tail verte- 

 brae, 350; hind foot, 142. Skull (type) : greatest length, 130; con- 

 dylobasal length, 125.8; zygomatic breadth, 83.3; length of nasals, 

 32 ; greatest breadth of nasals anteriorly, 14.3 ; greatest breadth of 

 nasals posteriorly, 13; interorbital breadth, 25.7; palatal length, 75.8; 

 upper molariform toothrow, 40.3. 



Remarks. — Comparison of the Panama series and South American 

 material from various localities, including a specimen from northern 

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

 and the type and two topotypes of E. c. protcus of northern Col- 

 ombia, shows that the species is represented in Panama by an ap- 

 parently well-marked geographic race. The close agreement in 

 dentition and the more essential characters, however, point to a 

 probable intergradation of the forms of this group, which may now 

 stand as follows : 



Euprocyon cancrtvorus cancrivorus (Cuvier), Cayenne. 

 Euprocyon cancrivorus proteus (Allen), Bonda, Colombia. 

 Euprocyon cancrivorus brasiliensis (Von Ihering), Southern Brazil. 

 Euprocyon cancrivorus panamensis Goldman, Gatun, Canal Zone, Panama. 



The South American raccoon currently known as Procyon can- 

 crivorus was placed in the subgenus Euprocyon by Gray in 1864 

 (type Ursus cancrivorus Cuvier), and this division of the genus has 

 been accepted by some later authors. The two sections of the genus 

 differ, however, in characters so important that Euprocyon seems 

 entitled to full generic recognition. Besides the characters pointed 

 out by Gray Euprocyon is distinguished by the shorter, more rounded 

 condition of the cusps in the molariform teeth and the general ob- 

 literation of the rugosity seen in Procyon. This is well shown in 

 the upper carnassial where the trenchant commissure of the median 

 outer cusp and the postero-internal cusp present in Procyon, is 





