﻿368 PROCEEDINGS OF THE NATIONAL MUSEUM vol. loo 



SYLVILAGUS BBASIUENSIS TAPETILLUS Thomas 



Lepxis brasiliensis, Btjrmeisteb, Systematische Uebersicht der Thiere Brasiliens 

 . . . pt. 1, Mammalia, p. 252, 1854 (Brazil, probably southeastern).— 

 Pelzeln, Verh. zool.-bot. Ges. Wien, vol. 33, p. 80, 1883 (part; Rio de 

 Janeiro; Sapitiba).— Hensel, Abh. Akad. Wiss. Berlin, 1872, p. 62, 1873 

 (Rio de Janeiro, sold in market). — Ihering, Os mammiferos do Rio Grande 

 do Sul, Annuario do Estado do Rio Grande do Sul, 1892, p. 112, 1893 (Passo 

 Fundo, Rio Grande do Sul; Rio de Janeiro); Os mammiferos de S. Paulo, 

 Catalogo, Diario Official, Sao Paulo, p. 22, 1894 (Sao Paulo); Rev. Mus. 

 Paulista, vol. 2, p. 151, 1897 (Ilha de Sao Sebastiao, Sao Paulo). 



Sylvilagus brasiliensis, Thomas, Ann. Mag. Nat. Hist., ser. 7, vol. 8, p. 535, 1901 

 (Porto Real, near Rezende, Rio de Janeiro). 



Sylvilagus tapetillus Thomas, Ann. Mag. Nat. Hist., ser. 8, vol. 11, p. 210, 1913. 



Holotype. — Adult (?), sex not determined, skin and skull, B.M. No. 

 92.11.24. 3; collected by L. Hardy de Dreneuf. 



Type locality. — Porto Keal, Rio Parahyba, near Rezende, Rio de 

 Janeiro, Brazil; altitude, 380 meters. 



Distribution. — Southeastern Brazil, states of Rio de Janeiro and 

 Rio Grande do Sul. 



Characters. — Probably not markedly different from typical bra- 

 siliensis and minensis; darker, more warmly and uniformly colored, 

 sides less contrasted than in paraguensis ; base of ear dark brown or 

 mixed dark brown and buffy; side of muzzle less gray, with more 

 black than in paraguensis. 



Measurements. — Those of an adult male (skull only) from Rio de 

 Janeiro and a young female from Rio Therezopolis, followed by those 

 of an adult female from Sao Paulo, respectively: Total length, -, 

 310, 390; tail, -, -, 17; hind foot, -, 71, 82; ear, dry from notch, -, 

 38, 53; greatest length of skull, 72.9, 58.8, 71.9; condylobasal length, 

 67.4, 52.3, 64.6; zygomatic breadth, 34.2, 30.4, 36.4; length of nasals, 

 29.1, 21.5, 31.4; greatest combined width of nasals across premaxillary 

 sutures, 14.2, 12.9, 14.5; least length of palatal bridge, 7.3, 6.0, 6.3; 

 distance between outer sides of maxillary plates of tooth rows, 23.7, 

 19.0, 23.3; alveolar length of molar row, 15.6, 11.1, 14.3. 



Remarks. — External characters given above are those of a young 

 adult from Therezopolis, Rio de Janeiro. The small size of the type 

 and only specimen available to Thomas led him to regard it as spe- 

 cifically distinct. External measurements given were taken ''on the 

 badly prepared" skin of what was said to be an "old specimen." 

 Original cranial measurements of tapetillus compare with those of the 

 young Therezopolis specimen. They are also comparable, as follows, 

 with those given by Thomas for gibsoni described as a subspecies of 

 brasiliensis, respectively: Greatest length of skull, 61, 62.5; condy- 

 lobasal length, 55, 56; zygomatic breath, 32.5, 31.5; alveolar length of 

 molar row, 13, 12. 



Specimens examined. — Four. The type (B.M.); Rio de Janeiro, 



