384 DR. J. E. GRAY ON THE GENERA AND SPECIES [Apr. 11, 
canal for the whole length. Fur of body and tail short, bristly. 
Tail tapering, prehensile. Skull long, slender; nose nearly as long 
as brain-case (Rapp, t. 5). 
Living on trees. 
Penis (figured by Rapp, Edent. t. 6. f. 4) is elongate, cylindrical, 
rather tapering, covered with rings of acute tubercles and with a glo- 
bular gland. 
1. TAMANDUA BIVITTATA. Collared Tamandua. B.M. 
Head, shoulders, fore limbs, outside of hind limbs, and middle of 
the tail white ; a stripe from each side of the neck over the shoulder 
and remaining part black. ‘Tail but little longer than the body ; 
its terminal third scaly.”’—Turner. 
Var. Black less intense. 
Myrmecophaga tridactyla, Linn. 8. N. 51. 
M. tetradactyla, Linn. 8S. N. 52; Rapp, Edent. 14, t. 3, t. 5 
(skull). 
M. tamandua, Cuv.; Desm. Mamm. 374; Blainv. Ostéogr. t. 
(skeleton). 
Tamandua tetradactyla, Lesson ; Gray, Cat. Mamm. B. M. 191; 
Gerrard, Cat. Bones B. M. 288; Turner, P. Z. S. 1851, p. 218; 
Desm. N. Dict. H. N. xii. 107. 
M. bivittata, Desm. N. Dict. H. N. xii. 107. 
M. nigra, Geoff.; Desm. N. Dict. H. N. xii. 107. 
M. myosura, Pallas, Miscell. 64. 
M., ursina, Griff. A. K. 16. 
M. ecrispus, Riipp. Mus. Senck. iii. 179. 
Tamandua, Buffon, H. N. x. 144; Cuvier. Oss. Foss. vy. 101. 
Middle Ant-eater, Penn. 
Hab. Brazil; Paraguay. 
Myrmecophaga annulata (Desm. Mamm. 374, from Krusenstern, 
Voyage, t. fig., altered Griffith, A. K. t. 144) and” M. annulata et 
M. striata (Shaw, from Buff. H. N. Supp. iii. t. 56) are only a Coati 
(Nasua) disfigured. 
2. TAMANDUA LONGICAUDATA. Yellow Tamandua. B.M. 
Uniform light ochraceous, with a paler vertebral line ; tail nearly 
double the length of the body, its terminal half covered with small 
scales and a few scattered black hairs; ears large, rounded, about 
one-third the length of the head; no shoulder-streak. 
Myrmecophaga longicaudata, Wagner ; Turner, P. Z. S. 1851, 
p- 218; Burm. Thier. Bras. 304. 
Hab. ? (B. M. and Zool. Soc.). 
15. CycLotHuRvws. 
Toes 2/5; the outer front one much the largest. Pterygoid bones 
meeting, presenting two long, parallel, and little prominent crests, 
and much extended backward, and not forming a canal. Skull short, 
