﻿90 



IS SI 



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



4 



tuated entirely within the thoracic cavity. It is recognizable in weak narrow muscular 

 fasciculi, which lie alongside the spine and heads of the ribs, from the 8th dorsal back- 

 wards. The said fleshy part terminates in five or six semiimited, flat, weak, suhequal 

 tendons, which are inserted on the lateral surfaces of tlie bodies and anterior zygapophyses 

 of the 9th, 10th, and 11th dorsals and two anterior lumbar vertebrse \ I may furtbr 

 remark in this place that although the rectus capitis anticus major does enter the chest, 

 its volume is small and insignificant as respects power- of dorso-vertebral curvature. 



The series of intercostal muscles, both external (which, as usual, cease at the junction 

 of ribs and costal cartilages) and internal, are strong ; so are the levatores costarum 

 which are very manifest, and, indeed, all things considered, powerful to a degree. Some 

 few fibres I differentiated are analogous to the so-called subcostal muscles of Man. The 



D 



sterni is weak, and stops short of the xiphoid bone and cartila 



s 



I shall again have occasion to show that the chief axis of movement in the spine 

 during the act of flexion is between the second and third lumbar vertebra}. The thorax 

 of itself, under ordinary circumstances, has a considerable antero-posterior or spinal 

 curvature — and when the body is bent, one well nigh equal to that of the sacral region. 

 In this posture, moreover, the ribs are thrown widely out, particularly the five hindmost, 

 the costal cartilages are thrust forwards and in part override, and the ensiform sternal 

 segment, by relaxation of the abdominal muscles, yields and falls downwards. It further 

 results that the abdominal viscera are shoved forwards ; and as the lungs and heart are 

 necessarily confined and pressed against by the liver and diaphragm, their bulk dimi- 

 nishes in proportion. The heart then tilts well to the left ; the lungs bulge out poste- 

 riorly, 80 that the liver is well provided with stowao^e-room. Moreover it seems to me 



that those muscular fibres of the diaphragm which surround the inferior vena cava so 

 compress it as to prevent the return of the blood towards the heart, the return of blood 

 to the heart being temporarily through the superior cava. 



3. Caviti/ of Mouth, Laryngeal Apparatus, ^o, 



Valate and J)entition.-~~The palate is long, narrow, and elliptical in configuration, 

 and from anterior apex to pharyngeal arch measures 2^ inches. Of this nearly 1 inch 

 behind (chiefly soft palate) is smooth and flat ; the remainder (hard palate) is ridged-its 

 antenor moiety being slightly concave, the posterior moiety or mid third of the whole 

 pn atal surface having a tendency to median raphe. There are eleven distinct and one 

 mdehiu e ndge. The fourth, sixth, and eighth do not arch quite across ; the remamder 

 do ; and uU have a more or less forward curvature. 



Tins specimen presented no difference in its dental formula from that enunciated br 



With reference to tho thoracic re^'ftn c,f rn i i „ 4. 



tion Z c D n ■ <. sr 7 ^ G^^lamychpliorus tmncaius, one sentence of Hyrtl's is worthy of quota- 



^2^ l^ZZ T'r^''-^-^- S-« --culum, in interne thoracis ambitu reperiundu.>c 



^^rt«hn. hmHali J apoDhvTtr '^ "^ ''"^'''*- ^'^^°^^* ^^^^^'^^^ P^°^i^« ^^'^^''' ^^^*^°^' ' P"^" 



U.rioril>u. ftoracis vortehns .^^^ ''''''' '""^'"" '^'''^'''' ^^^ ^''^^''' ^^^^^^^°^ ^^^^^^ ^^*^^^"' '' ''' ^" 

 hfinim .y.A^^'...: ^. » ■ '1^'''^^ columnam deorsum cnrvahif Pt. flmr.pi i^ ar^'f. nunfl Ouadratus Im- 



