A rare Armadillo from Peru described under the names of _Cryptophractus pilosus_ and _Praopus hirsutus_, but which evidently belongs to _Tatusia_, is of some interest owing to the thick coat of hair with which it is covered. This animal appears to be closely allied to _T. novemcincta_, from which it mainly differs by having the whole of the carapace covered with a thick coating of light brown, fine, but rather stiff hair, about an inch and a half in length. Similar hair is found on the cheeks, the proximal portions of the limbs, and (although less abundantly and shorter) on the under surface of the body. The cephalic shield, snout, feet, and the tail, with the exception of the root, are bare. The coating of hair on the back and sides completely conceals the carapace, except near the margin of the scapular region; but by separating the hairs the bands and scutes are rendered visible.[109] In the Pleistocene cavern-deposits of Brazil have been found remains of _T. novemcincta_, and also of _T. punctata_, which appears to be an extinct form nearly allied to _T. kappleri_, but of somewhat larger size. _Extinct genera._—In addition to remains referable to existing genera, the above-mentioned deposits have also yielded evidence of the former existence of extinct generic types of Armadillos, some of which attained very large dimensions. Of these _Eutatus_ was a large form distinguished from all existing genera by the circumstance that the whole of the carapace was composed of movable bands, which were thirty-three in number. _Dasypotherium_ was a still larger form, furnished with eight teeth, of which the second seems to have been larger than the others; this genus is regarded as connecting the modern Armadillos with the next one. The gigantic _Chlamydotherium_, the scutes of which are common in the Brazilian caves, is considered to have been as large as a Rhinoceros; the carapace has several movable bands, but the teeth approximate in structure to those of the next family, so that the genus tends to connect the Armadillos with the Glyptodonts. _Family_ GLYPTODONTIDÆ. [Illustration: FIG. 68.—Tooth of _Glyptodon_ from the side, and from the grinding surface. (After Owen.)]