374 DR. J. E. GRAY ON THE GENERA AND species [Apr. 11, 
See also Dasypus punctatus, Lund.; Tatusia, sp., Turner, P. Z.S. 
1851, p. 213. 
Defined from a denuded skin in Mus. Coll. Surg. 
B. Plantigrade. Palms and soles bald, callous, with a prominent 
heel. The toes of the fore feet united to the claws, compressed ; 
claws compressed, sharp-edged beneath. Toes of hind feet se- 
parate; claws elongate, acute. Head broad; forehead flat- 
tened ; nose short ; ears far apart, on side of the head. Body 
depressed. Platychlamydes. 
The body is depressed, expanded, more or less covered with hair, 
which sometimes almost hides the tesserze of the shield. Legs short, 
strong ; the whole of the feet applied to the ground in walking. 
* Head ovate ; forehead convex ; teeth numerous, small ; intermax- 
illaries toothless. The first three or four rings of tesser@ of the 
scapular rings partially free. Tail not ringed. The soles of 
the hind feet with tessera on the sides and behind. 
5. Prionopos. 
The three or four front rings of the scapular shield deeply di- 
vided, free when young; central rings numerous. Tail not ringed, 
with the tesserze placed alternately. Plantigrade; soles of the feet 
partially covered with tesseree. Toes 5/5; two inner front toes small ; 
outer very small, rudimentary; second and third large; the third 
very large, with a very large claw. Skull broad; nose broad. Teeth 
a small ; intermaxillary toothless. Osteology, see Turner, P. Z.S. 
1851, p. 215; Cuv. Oss. Foss. v. t. 11. f. 1,3; Rapp, Edent. t. 11. 
Prionodontes, F. Cuv.; Less. Man. 309; Turner, P. Z.S. 1851. 
Priodonta, Gray, Cat. Mamm. B. M. 
D. (Priodontes), Rapp, Edent. 10. 
Cheloniscus, Wagler ; Krauss. 
The skeleton is figured by Rapp, Edent. t. 46. f.1. The two 
inner toes of the fore feet elongate, slender, with small claws; the 
three others short ; the third very stout, with a very large claw ; the 
fourth similar, but smaller; the fifth or outer very small and short. 
The pelvis very broad behind ; the second cervical vertebra elongate, 
with a very high superior central crest, and very rudimentary lateral 
processes. 
Prionopos Gicas. Tatou. B.M. 
Dasypus gigas, Cuv. Oss. Foss. v. 128, t. 11. f.1,55; Pr. Max. 
Beitr. i. 516; Burm. Brasil. 277. 
D. giganteus, Desm. Mamm. 368. 
Priodonta gigas, Gray, Cat. Mamm. B. M. 120; Owen, Odont. 
t. 85. f. 1; Gerrard, Cat. Bones B. M. 287. 
Priodontes gigas, Tumer, I. c.; Gervais, Expéd. de F. Le Castel- 
nau, Mamm. t.18; Rapp, Edent. t. 4 6 (skeleton). 
