MYRMECOPHAGA.—CYCLOTURUS. 193 
locality has not been noted. Mr. Salvin obtained several specimens on the Volcan de 
Fuego in Vera Paz, as well as in Costa Rica, where Dr. v. Frantzius also found it, both 
in the lowlands and in the cooler climate of the central tableland?. The specimen 
obtained by Mr. Salvin at Punta Arenas, in Costa Rica, was found sleeping in the fork 
of a low tree near the shore. 
This Anteater varies considerably in its markings, but Central-American specimens 
seem to be tolerably constant in this respect. ‘There is considerable difference, however, 
in the intensity of the dark colour, and in the distance to which the narrow dorsal 
stripe is produced towards the tail. 
2. CLYCLOTURUS. 
Cyclothurus, Gray, Ann. of Phil. x. p. 343 (1825). 
Myrmydon, Wagler, Nat. Syst. Amph. &c. p. 86 (1830). 
Cycloturus, Sclater, P. Z. S. 1871, p. 546 (footnote). 
This genus is at once separable from Myrmecophaga by the remarkable structure of 
the fore foot, in which only two toes are developed. The first and fifth digits are 
entirely absent; the fourth is represented by a rudimentary metacarpal; while the third 
and second each consist of two phalanges only, and are armed with curved claws, the 
last-named being much the more slender of the two. The fur is remarkably glossy and 
silky, and the tail is strongly prehensile. In the skull the facial portion is much arched, 
and the canal of the posterior nares is not continued backward by the meeting of the 
palatines and pterygoids, as in the last genus. ‘The ribs are peculiar in being flattened 
and expanded on their posterior border, so as to lap over one another like tiles. 
The only well-established species isa graceful little animal of a more or less yellowish- 
grey colour, often with a darker longitudinal streak on the back, and sometimes with 
another on the breast and belly. Its length is about eight inches, that of the tail 
being about the same. | 
1. Cycloturus didactylus. 
Myrmecophaga didactyla, Linnzeus, Syst. Nat. i. p. 51 (1766, ex Brisson) *. 
Cyclothurus dorsalis, Gray, P. Z.S. 1865, p. 885, pl. xix. (descr. orig.)*; Frantzius, Arch. f. Naturg. 
xxxv. 1, p. 308°. 
Serafin de Platanar of Costa-Ricans *. 
Hab. Guaremata, Vera Paz (Godman & Salvin, Mus. Brit.*); Costa Rica, Orosi (Frant- 
zius®; Arcé, Mus. Brit.); Panama, Chiriqui (Arcé, Mus. Berol.).—SoutH AMERICA 
to Northern Brazil and Peru. 
In 1865 Gray separated the Two-toed Anteater of Costa Rica from the well-known 
BIOL. CENT.-AMER., Mamm. Vol. 1, December 1880. 2C 
