162 



MR. A. SANDERS ON LIOLEPIS BELLI. 



[Feb. 6, 



Obliquus externus abdominis (figs. 9 & 13) arises by eight mus- 

 cular digitations, the two anterior being attached to the extremity of 

 the penultimate and to the posterior border of the last cervical rib, the 

 remaining six being attached to the ribs at the external border of the 



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Atlas. 



Prevertebral group of muscles. 

 Second cervical rib. tf>. Centrum of ninth vertebra, 



sacro-lumbalis, a point which might be regarded as their angles. The 

 anterior portion of this muscle is inserted into the anterior border 

 of the long xiphisternum beneath the pectoralis major ; the remainder 

 into the borders of the rectus abdominis and the extremity of the 

 tenth dorsal rib, which is much longer than the others, and reaches 

 by a free cartilaginous extremity nearly to the pelvis ; the postero- 

 dorsal border of the muscle is free and does not reach the pubis ; 

 the fibres are directed downwards, backwards, and towards the 

 ventral surface, and they contain in their substance several fine ten- 

 dinous intersections. 



