MYVRMECOPHAGIDA 193 
fourth, a very minute one on the first, and none on the fifth, which 
is entirely concealed within the skin. The hind foot has five 
subequal claws. Vertebre: C7, D17,L2,85, C37. There are 
very rudimentary clavicles. 
The Tamandua (Fig. 65) is much smaller than the Great 
Anteater, and differs essentially from it in its habits, being mainly 
Fic. 65.—Tamandua Anteater (Tamandua tetradactylu). From Proce. Zool. Soc. 1871, pl. xliii. 
arboreal. It is an inhabitant of the dense primeval forests of 
South and Central America. As different individuals vary much 
in their coloration, it is possible that there may be more than one 
species. The usual colour is yellowish-white, with a broad black 
lateral band, covering nearly the whole of the side of the body. 
Cycloturus.1—The skull is much shorter even than in Tamandua, 
and is arched considerably in the longitudinal direction. It differs 
from that of the other members of the family mainly in the long 
canal for the posterior nares not being closed by bone below, as 
the greater part of the palatines and the pterygoids do not meet in 
the middle line. The mandible has a prominent, narrow, recurved 
coronoid, and a well-developed angular process ; it is strongly de- 
curved in front. Vertebre: C7, D16, L2, 84, C40. Ribs 
remarkably broad and flat. Clavicles well developed. Manus 
remarkably modified, the third digit being greatly developed at the 
expense of all the others, and having a stout short metacarpal and 
but two phalanges, of which the most distal is large, compressed, 
pointed, and much curved, and bears a very strong hook-like claw. 
The second digit has the same number of phalanges, and bears a 
claw, but is very much more slender than the third. The fourth 
is represented only by the metacarpal and one nailless phalanx, 
the first and fifth only by very rudimentary metacarpals. The pes 
1 Gray, Annals of Philosophy, new series, vol. x. p. 343 (1825). 
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