14 TRICHOLOGIA MAMMALIUM; 
CHAP DER te: 
PART 20, 
Or THE MantTLe AnD Hair-Like Processes oF THE ARMADILLO.—This animal, instead 
of being covered with pile, has his body protected by a mantle, out of the divisions of which 
issue hair-hke processes. 
This mantle we have heretofore particularly described,* but it will be necessary to 
recur briefly to the buckler. This is composed of unequal sided hexagons and_parallelo- 
crams, the internal structure of the latter of which is represented in figure 7, where it will 
be seen that the main arterial trunk, A., lies horizontally, communicating with the interior 
of the armor by a foramen situated near the end of the parallelogram towards the 
hexagons. This main trunk divides, successively, into five horizontal limbs; four of 
which, viz: 1, 2, 3 and 4, after anastomosing, terminate near the other end of the parallelo- 
gram in as many fusiform follicles, B., from each of which emerges, horizontally, a hair, or 
hair-like process, C. The fifth limb, No. 5, inclines abruptly to one side of the 
parallelogram, and after a much shorter course, comparatively, terminates in an orbicular 
capsule, D., from which, through a foramen communicating with the anterior surface, 
issues, vertically, another hair, or hair-like process, invested with a sheath, e. Besides 
these five limbs, there are six branches. Four of these, i. e. two on each side, issue out of 
the main trunk, below its first limb-fork. These subdivide into numerous twigs, which 
do not anastomose. From limb No. 4, about half way beyond its fork, is another and the 
largest branch of all, 7. This anastomoses with the limb, and divides into numerous 
twigs, but does not terminate in either a follicle or capsule. ‘The limb on the opposite side, 
No. 1, above its fork, has four branches, 8, which do not anastomose or terminate in either 
follicle or capsule, but divides into numerous twigs. Between limbs Nos. 1, 2, 3 and 4, 
are three interfolical vessels, 9. These anastomose with the follicles, and open out at the 
end of the parallelogram. 
Some of the anastomosing vessels empty into culs de sac, 0, approaching, in dimensions, 
almost to that of the main trunk. These are generally situated at, or near, the root of a 
follicle, and may be reservoirs. 
Kach of the above mentioned vessels may be, and probably is, accompanied by an artery 
and vein; for the animal possesses the power of repairing and re-producing injured or lost 
plates; we have examined a specimen of an Apara that bears the marks of that operation 
having been performed. 
Description of the hairs and hair-like processes.—Greatest length 2 inches and ,%;. 
Shapes, cylindrical and oval. Diameters, some ;1,, others ;4; by gy, gty by ay, and 
others again ;4, by j4. Color, corneus. Lustre, feeble. Direction at an acute angle. 
Inclination, straight. 
* In a pamphlet published in 1848, 
