346 



STEUCTUEE OF THE LAEVAL POLYPTEEUS. 



n.A.br. Subaortic bridge. 



Sep. Scapula. 

 s.Ch.hr. Subnotochordal bridge. 

 s.d. Segmental duct. 

 s.o.c. Supraorbital canal. 

 S.occ, Supraoceipital region. 

 s.oc.br. Supraoceipital bridge. 

 Sph. Sphenotic. 

 Sph.Eth. Cartilage of sphenethmoid region. 

 Sp.i. First spinal nerve. 

 st. Stomach. 

 St.Hy. Stylohyal. 



II., 



r. Testis. 



Tr. Trabecule cranii. 

 tr.pr. Transverse bony process. 



U.S. Urinary sinus. 

 V.Ao. Ventral aorta. 

 v.l.m. Ventro-lateral muscles. 

 v.pr. Ventral process. 

 v.r. Ventral rib. 

 X. Point where oviduct will (jpeu 

 into urinary sinus. 

 III., v., &c. Positions of exit of eraniul 

 nerves. 



