yA SKULL OF ARMADILLOS CHAP. 
half jaw, of which one is often implanted in the premaxilla. 
The Armadillos show their alliance with the other American 
Edentates in the points enumerated above. Their teeth specially 
ally them to the Sloths, while the salivary and digestive organs 
generally are on the Anteater plan, but present a less extreme 
development. There are, however, caeca, paired as in birds, in 
the genera Dasypus and Chlamydophorus. The others have none. 
But there is a dilatation at the commencement of the large 
intestine, which is not very different from the slightly-developed 
caeca of Dasypus. 
There are certain peculiarities in the skeleton, which dis- 
tinguish this family. 
The skull in the Armadillos presents a number of likenesses 
to the other American Edentates' The premaxillaries are 
Fie. 99.—Skull of Armadillo. Dasypus sewcinctus. 3%.  ex.oc, Exoccipital ; 77, 
frontal ; maz, maxilla; nas, nasal; pai, parietal; pert, periotic ; p.max, pre- 
maxilla ; s.oc, supraoccipital ; sq, squamosal; ¢y, tympanic. (From Parker and 
Haswell’s Zoology.) 
small, but are larger in Dasypus than in 7atusia. On the other 
hand the lachrymals are larger in the latter. The zygomatic arch 
is complete, but there is no downward process as in the Sloths. 
In Zatusia (but not in Dasypus) the “short thick pterygoids add 
somewhat to the hard palate.” This is clearly a beginning or : 
remnant of the quite crocodilian character of the palate of 
Myrmecophaga. In the cervical vertebrae we see the Whale-like 
character of fusion between individual vertebrae; and also, as 
in the Whales, the degree to which this fusion is carried out 
' For the anatomy of several forms, see Garrod, Proc. Zool. Soc. 1878, p. 222, 
who quotes other memoirs. 
