h.m 



s.t. 



st 



-pu 



31 



FIG. 156. Skeleton of Skate. (From a preparation.) 



h.vi., Hyo-mandibular ; s.t., sensory tube ; h.br., hypo-branchial, 

 No. 5 ; v.pl. , vertebral plate ; c., coracoid region ; s.v., spiral valve ; 

 s.c.,^ scapular region; n.c., nasal capsule; p.q., palato-quadrate- 

 cartilage (upper jaw) ; M., Meckel's cartilage (lower jaw) ; /.//., 

 pro-pterygium ; m.pt., _meso-pterygium ; vit.pt., meta-pterygium ; 

 st., stomach ; pu., pubic bar. 



