1872.] MR. A. SANDERS ON LIOLEPIS BELLI. 159 



is continuous with that of the opposite side, being but slightly at- 

 tached to the neural spines ; the fibres converge towards the ventral 

 surface, and are inserted into the inner border of the humerus, at about 

 the proximal end of the middle third of the shaft, by a strong- 

 flat tendon, which passes between the inner and long heads of the 

 triceps. 



Levator scapulae (figs. 3, 5, & 6) arises from the external surface 

 of the antero-dorsal angle of the suprascapula, and from the anterior 

 edge of the scapula, internal to the origin of the omo-hvoid ; it pro- 

 ceeds oblicpaely forwards, to be inserted into the side of the atlas. 



Sterno-coracoidalis (fig. 6) arises from the inuer surface of the 

 coracoid by a flat tendon which is situated along the inner border of 

 the subscapularis and the lower edge of the coracoid fenestra ; 

 its fibres are directed backwards, and are inserted into the posterior 

 sixth of the inner surface of the sternum and into the base of the 

 xiphisternum aud cartilages of the second, third, and fourth dorsal 

 ribs. 



Sterno-coracoidalis externus, situated deeper than the last, is a 

 distinct fasciculus, which arises from the inner surface of the coracoid, 

 and, running backwards and inwards, is inserted into the whole length 

 of the antero-lateral border of the sternum. 



Serrati (figs. 1, 3, & (i) are three in number; the posterior arises 

 from the posterior concave edge of the suprascapula for nearly its 

 whole length : the fibres pass downward and backward, to be inserted 

 into the free extremities of the third and fourth cervical ribs ; they 

 continue beyond this point to an additional insertion into the an- 

 terior edge of the xiphisternum. 



Serratus anterior arises from the whole dorsal edge of the supra- 

 scapula, and, passing directly towards the ventral surface, is inserted 

 into the free extremities of the first and second cervical ribs. There 

 was another small fasciculus, arising from the antero-dorsal angle of 

 the suprascapula, which was accidentally cut off; but I i'ound 

 attached to the extremity of the second cervical rib another distinct 

 fasciculus, evidently belonging to it. 



Caudal muscles (figs. 12 & 13). These have the usual arrange- 

 ments ; posteriorly they have six serrations on each side, three above 

 and three below the transverse processes of the caudal vertebrae ; an- 

 teriorly the dorsal and ventral serrations become deficient, while the 

 lateral ones are continued forward to be inserted into the trans- 

 verse processes of the first caudal vertebra by a pointed extremity. 



Sacro-lumbalis (figs. 3, 4, & 12) arises from the posterior ex- 

 tremity of the ilium ; the fibres, passing forward, are attached to the 

 dorsal surface of all the ribs from the last dorsal to the first cervical ; 

 externally it is inseparable from the intercostales ; internally it is 

 easily dissected from the longissimus dorsi ; posteriorly its ventral 

 surface is continuous with the quadratus lumborum ; corresponding 

 to each rib, there occurs in its substance a tendinous intersection. 



Cervicalis ascendens (fig. 5) is a continuation of the last muscle 

 which proceeds forward from the first cervical rib, to be inserted, in 

 conjunction with the levator scapula, into the body of the atlas at a 



