﻿DR. J. MURIE ON THE THREE-BANDED ARMADILLO. 105 



Tne sacrococcygeus, lying outside, has a broader origin, which does not extend so far 

 forwards as the last. Its caudal tendons, one to each vertebral element, are most delicate 



■ - ■ 



towards the end of the tail, yet tough and the reyerse of weak. 



The third, a short fleshy muscle, is covered almost entu'ely by the sacrococcygeus. It 

 answers partly to the ischiococcygeus of some mammals and birds. Of a widish trian- 

 gular shape, apex behind, it is spread out on the ischium inwards from below the neigh- 

 bourhood of the tuberosity to the outer margin of the infracoccygeus. Posteriorly it is 



r 



fixed to the lower surface of the incurved arch of the pelvic shield, viz. on the rear angle 



r 



of the hind-leg chamber of the carapace. 



Whilst the first-mentioned pairs of muscles "flex the tail itself, the third pair act on the 

 pelvic shield, forcibly dragging it down and at the same instant forwards as the animal 

 rolls the body together. 



Levatores caudse. — These are also three ia number on each side. The levator cauda* 

 externus and internus commence by aponeurotic fascia which lies close against the 

 spinous edge of the sacrum, in proximity to the end of the spinalis dorsi &c. and there not 

 readily separable. As the transverse processes of the sacrum broaden, fleshy fibre in- 

 creases ; and this again diminishes and separation of the caudal tendons follows, opposite; 

 the arch of the pelvic shield. The usual distribution of tail-tendons takes place within 



the bony tunnel (vide fig. 12, Tab. XXIV). 



' The lumbo-caudalis^ a small muscle lying outside the preceding, is narrower and 

 weaker than the ischiococcygeus. It springs from above and inside the ischial tubcr- 

 6sity, terminating by a partially compound tendon on the side of the root of the tnil, 

 opposite the posterior apex of the arch of the pelvic shield. 



The external oblique ' muscle of the abdomen arises by ordinary digitations from cighf 

 or nine of the posterior ribs, the digitations however being short. It has also attach men < 

 to the whole of the last rib, the lumbar fascia, transverse processes of the loin-vertebrae, 

 and anterior spine of the ilium. I omitted registering remarks on the internal oblique, 

 but noted that the rectus abdominis narrowed anteriorly, and reached, but barely pro- 

 ceeded beyond, the xiphoid cartilage. Poupart's ligament, however, is very considerably 

 accentuated, and conspicuously defines the rear of the abdominal parictes in the fli^xtxl 

 condition of the hind limbs. The testes fit into the hollow just within, and seem to pcvr 



out at the abdominal ring. 



■ 3. Cranio-facial Muscles 



Belonging to the face I took note of the following scries : 



1. The uppermost of a pair (or three ?) long levators or retractors extending bct^-.'n, 



orbit and snout, springs from the oAital surface of the maxillary bone by a Hat floshy 

 belly. This develops a large tendon which proceeds straight forwards to the root of the 



upper narial cartilage. . , 



2. The next, similar in character, although situate inferiorly, partiaUy overlaps tbo pr. - 



It has somewhat more of an infraorbital and jugal attachment. At 



ceding at its w.^^^ 



the side of the superior maxilla it splits into two, the tendons of which continue 



remarks on this muscle in the iTanatec <tc., Trans. ZooL Soc 



XXX 



p 



