18G8.] DR. J. E. GRAY ON THE CANID.i;. 513 



C. cancrivonis americanus, Burmeister, Fauna Bras. t. 27 (skull). 



Vulpes magellanicus. Gray, Mag. N. H. 1830, p. 5/8; List 

 Mamm. B. M. Gl ; Gerrard, Cat. Bones of Mamm. 87. 



tCanis azarce, Waterhonse. 



? Colpeo, Canis colpaceus, Molina. 



iCanis tetradactyla, Meyer. 



Chile Fox, Shaw, Zool. 329. 



Hab. Chili and Bolivia {Brulc/es) ; Strait of Magellan {Darwin). 



In the British Museum there are skulls from Chih, marked 184 a,c, 

 and 184y, Vulpes mayellanicus, which are those of adult animals, 

 and have a linear crest extending the whole length of the crown. 



There is another skull, evidently from the same series, no. 184 e, 

 also without any skin belonging to it, which has its adult teeth, but 

 is not so large or aged as the others. It has a broad flat crown 

 (separating the temporal muscles), which is wide in front and tapering 

 to the occiput ; and the side margins are rather curved in, giving it 

 a slightly vase-like form. Length 5 inches 7 lines, width 2 inches 

 1 1 lines. 



There are also a skull and skeleton (no. 184 6) from Chili, of 

 which the skull is intermediate in size between the larger skulls 

 and the small one. The coronal crest is linear ; but there is an 

 indication of the vase-shaped crown-plate on each side of the central 

 ridge. 



Nos. 817 a, b, c, d, e are five smaller skulls, named Vulpes azarce, 

 sent from Bolivia by Mr. Bridges. They are very similar externally, 

 but they vary considerably in the size of the upper tubercular grinders 

 as compared with the other teeth, and slightly in the form of the 

 lobes of the upper sectorial tooth. The hinder upper tubercular is 

 always of the same form as the penultimate, but smaller. The 

 internal lobe of the sectorial tooth of V. magellanicus from Chili, 

 1 84 e, is rather larger, with the front edge on a level with the front 

 edge of the body of the tooth ; in the small skulls from Bolivia 

 the lobe is very slightly in front of the line of the fore edge of the 

 tooth. 



I believe these all belong to one species ; and they are very like 

 the skulls figured as Canis crancrivorus, var. brasiliensis, by Bur- 

 meister, Fauna Bras. t. 27. They are very different in the form of 

 the crown and other details from the skull figured as C. azarce by 

 Blainville, Osteogr. t. 4, and by Burmeister, Fauna Bras. t. 28, f. 4." 



4. PSEUDALOPEX ANTARCTICUS. B.M. 



Canis antarcticus, Shaw, Zool. i. 331 ; Desm. Mamm. 199 ; Gray, 

 List Mamm. B. M. 59 ; Darwin, Zool. Beagle, ii. t. 4. 

 Antarctic Fox, Penn. 

 Hab. Falkland Islands. 



5. PsEUDALOPEX GRACILIS. 



Canis (Pseudalopec) gracilis, Burm. Reise La Plata, ii. -10(> ; 

 Arch. Naturg. 1862, p. 130. 

 Hab. Pampas of Mendoza. 



