154 PATAGONIAN EXPEDITIONS: ZOOLOGY. 



the much smaller and otherwise peculiar Canis sladeni Thomas from Cha- 

 pada, Matto Grosso. 



Genus CERDOCYON Ham. Smith. 



Ceydocyon Ham. Smith, Jardine's Nat. Libr., IX, 1839, 259, 291. Includes 



Canis azarce Wied, 1826 (= Canis brasiliensis Schinz, 1821), Vtdpes 



magellanicus Gray, and two unidentifiable species. 

 Lycalopex Burmeister, Thiere Bras., 1854, 95, part, as a subgenus of Canis; 



includes Canis azarce Wied, C vetulus Lund, C. cancrivorns Desm., 



C. magellanicus Qx2.y \ Erlaut. Faun. Bras., 1856, 24, 31 ; includes C. 



cancyivoriis Desm., C. vetidus Lund, C. fnlvicaudiis Lund. 

 Lycalopex Gray, P. Z. S., 1868, 51 1, as a full genus, to include L. vetuhis 



Lund, and C fidvicandus Lund. C. cancrivorns is removed as the 



type of Gray's Thons, gen. nov., nee Ham. Smith, 1839. 

 Pseudalopex Burmeister, Erlaut. Faun. Bras., 1856, 24, 44, includes Canis 



azarce (Wied), C griseus Gray, C. magellanicus Gray. 

 Pseudalopex Grdij, P. Z. S., 1858, 512 = /^. azarce (Wied), P. griseus 



(Gray), P. magellanicus (Gray), P. antarcticus (Shaw), P. gracilis 



(Burm.). 

 Cercodocyon was proposed by Hamilton Smith in 1839, as a "section " 

 of his "subgenus" C//(7c;/, for a group of species he called "Aguara Foxes," 

 of which he recognized four species — (i) Cerdocyon mesoleucus sp. nov., 

 (2) Cerdocyon guaraxa, sp. nov., (3) Cerdocyon azarcB (Wied), and (4) 

 Cerdocyon magellanicus (Gray). The first was described from a living 

 specimen said to have come from South America; "it forms," he says, "a 

 kind of counterpart to Thous tnesomelas of the Cape [of Good Hope], and 

 might be mistaken for it." The specimen does not appear to have been 

 preserved, and the species has not been since identified. The second spe- 

 cies was described from one of the "original drawings of Prince John 

 Maurice of Nassau-Siegen," and is also unidentifiable. This leaves within 

 the genus two identifiable species, namely Canis azarcE Wied and Vulpes 

 magellanicus Gray, both well known, and commonly recognized as con- 

 generic. 



Lycalopex, originally proposed by Burmeister as a subgenus of Canis, 

 in 1854, contained Canis azarcB Wied and C vetulus Lund, to which he 

 also referred, in a footnote, Canis cancrivorns Desm. and C magellanicus 

 Gray. In 1856 he removed Canis azarce and C magellanicus to his new 



