ZOOTOMV. 



l^ 



FIG. 10. Raja nasuta (female). The skeleton seen from the ventral 

 aspect (one-fourth nat. size). On the left side (right in the figure) the 

 pectoral and pelvic fins, and on the right the hyoid and branchial 

 arches (with the exception of the fifth cerato-branchial) and labial 

 cartilages are removed. In the remaining pectoral fin, only the proximal 

 ends of most of the fin rays are shown, and the cartilaginous branchial 

 rays are omitted for clearness sake. 



ac, I, ac. 2, anterior and posterior acetabular facets : ant, antorbital 

 cartilage : au, auditory capsule : a.v.p, anterior vertebral plate : c.br. 3, 

 c.br. 5, third and fifth cerato-branchials : c.f t coracoid fontanelle : tr, 



