196 EDENTATA 
and bulb. The uterus is nearly or quite as simple as in the Sloths 
and Anteaters; and there is no reason to believe that the placenta- 
tion is essentially different from that obtaining in the other groups. 
Subfamily Chlamydophorinz.—In most anatomical characters, 
especially the structure of the fore foot, this little group resembles 
the Dasypodine ; but it differs remarkably from all other known 
Armadillos, living or extinct, in the peculiar modification of the 
dermal armour. 
Chlamydophorus.A—Teeth ae 
pressed, moderate in size, smaller at each end (especially in front) 
than at the middle of the series. Skull broad and rounded behind, 
pointed in front. Muzzle subcylindrical and depressed. A con- 
spicuous rounded, rough prominence on the frontal bone, just before 
each orbit. Tympanic prolonged into a tubular auditory meatus, 
curving upwards round the base of the zygoma. Vertebre: C7, 
D11,L3,810,C15. Upper part of head and trunk covered with 
four-sided horny plates (with very small thin ossifications beneath), 
forming a shield, free, and overhanging the sides of the trunk, and 
attached only along the middle line of the back. The plates are 
arranged in a series of distinct transverse bands, about twenty in 
number between the occiput and the posterior truncated end, and 
not divided into solid thoracic and pelvic shields with movable 
bands between. The hinder end of the body is abruptly truncated 
and covered by a vertically-placed, strong, solid, bony shield, of an 
oval (transversely extended) form, covered by thin epidermic plates. 
This shield is firmly ankylosed by five bony processes to the hinder 
part of the pelvis. Through a notch in the middle of its lower 
border the tail passes out. The latter is rather short, cylindrical 
in its proximal half, and expanded and depressed or spatulate in 
its terminal portion, and covered with horny plates. The dorsal 
surfaces of the fore and hind feet are also covered with horny 
plates. The remainder of the limbs and under surface and sides 
of the body beneath the overlapping lateral parts of the dorsal 
shield are clothed with rather long, very soft, silky hair, Eres and 
ears very small, and concealed by the hair. Extremities short. 
Feet large, each with five well-developed claws, those on the fore 
feet very long, stout, and subcompressed, the structure of the digits 
being essentially the same as those of Xenurus and Priodun. Nipples 
two, pectoral. Visceral anatomy closely resembling that of Dasypus, 
the cecum being broad, short, and bifid. 
The Pichiciago (C. truncatus), a small burrowing animal, about 
5 inches long, inhabits the sandy plains of the western part of the 
Argentine Republic, especially the Vicinity of Mendoza. — Its 
subcylindrical, somewhat com- 
) Harlan, Ann. New York Lyceum Nat. Hist. vol. i. p. 237 (1824),— 
Amended from Chiamyphorus. 
