378 DR. J. E. GRAY ON THE GENERA AND SPECIES [Apr. 11, 
Cabassu, Buffon; Cuv. Oss. Foss. v. t. 11. f. 7, 9. 
Xenurus, Wagler ; Turner, P. Z.S, 1851, p. 215 ; Krauss. 
The plates ow the inner side of the two inner toes of the fore and 
hind feet are ciliated with a series of bristle-like hairs. 
* Nose of skull elongate, produced. Tatoua. 
1. XenuRuS UNIcCINCTUS. Kabassu. B.M. 
Tail nakedish, with some scattered shields ; those of the base of 
the tail immersed ; becoming more abundant, closer, and more deve- 
loped at the end, especially on the underside of the tip. 
Dasypus unicinctus, Linn. 8. N. i. 52. 
D. gymnurus, Uliger; P. Max. Beitr. ii. 529. 
D. tatouay, Desm. Mamm. 369; Tschudi, Faun. Peru, 206 ; 
Guérin, Icon. Mamm. t. 34. f. 2. 
D. duodecim-cinctus, Schreb. Saugeth. 225, t. 75, 76. 
Tatusia tatoway, Lesson, Man. 311. 
D. multicincta, Thunb. Vet. Acad. Hand. 1818, 68, t. 1. 
Xenurus unicinctus, Gray, Cat. Mamm. B. M. 120; Turner, 
P. Z.8. 1851, p. 215; Gerrard, Cat. Bones B. M. 285. 
Dasypus xenurus et D. 12-cinctus, Krauss, Arch. Nat. 1862, p.19. 
Tatusia gymnura, Rapp, Edent. 9. 
Cabassou, Cuv. Oss. Foss. v. 120, t. 11. f. 7-9 (skull). 
Kabassou, Buff. H. N. x. 218, t. 40. 
Tatou Tatouay, Azara. 
Hab. Brazil, 8S Catharina; Surinam (Krauss); Guiana; Peru; 
Paraguay. 
In a young specimen, not in a good state in the British Museum, 
the plates of the dorsal shield are eroded, with a prominent ridge on 
each side. 
See also—1l. Dasypus verrucosus, Wagler, Seba, Thesaur. t. 30. 
f.4; Cuvier, Oss. Foss. v. 120; Burm. Thier. Bras. 287. 
2, D. gymnurus, P. Max. and Wagner. Appear like varieties or 
synonoma. 
What ‘is Xenurus nudicaudus, Lund, Turner, P. Z, 8S. 1851, 
p- 219, from ‘Tail shorter and more entirely naked” (Cuvier, Oss. 
Foss.) ? 
** Nose of skull short, compressed. Xenurus. 
2, XENURUS HISPIDUS. 
Skull short ; nose short, compressed; nasal bones short. 
Dasypus hispidus, Burmeister, Thiere Bras. i. 287 ; Giebel, Zeit- 
schrift, 1861, p. 93, t. 2, 34. f. 3, 4 (skulls of old and young). 
? Tatu, Seba, Thes. i. t. 30. f. 2, according to Burmeister. 
Cabassu, Cuv. Oss. Foss. v. 120. 
Hab. Brazil. 
In our skulls of X. unieinctus the distance from the perforation 
under the orbit to the end of the intermaxillary is 1? inch ; in Gie- 
bel’s figure it is 1,4; inch. 
I have not seen this species. The skull figured by Giebel is that 
