986 THE OSTEOLOGY AND MYOLOGY OF THE DEATH ADDER. 



Fig. 26. — The muscles in the interior of the snake's body. By the mid- 

 line we have the subvertebral rectus {S.R.) and the depressores 

 costarum {D.C.). On the left side of the figure levatores costarum 

 interni {L.C.I.), separated from the subvertebral rectus by the 

 intercostal nerves {I.N.). 



Fig. 27. — The depressores costarum {D.C.) are seen running forward to be 

 modified so as to form a rectus capitis anticus major {B.C. A.), and 

 at the same time representing the longus colli muscles. The most 

 anterior bundle of the sacro-lumbalis column (S.L.) is seen to pass 

 forward to be inserted on the basioccipital {B.O.), while the upper 

 division of the rectus capitis anticus runs outwards and is inserted 

 on the exoccipital. The scalene {S.) muscles are represented by the 

 continuation of the external intercostal group on to the anterior 

 vertebraB. 



