484 ON THE FINS OF ELASMOBRANCHS. 
Fig. 5 Right side of pelvic cartilage of ditto. 
0, obturator foramen; @, articular surface ; 7/, iliac eens ; P, seiraaube 
mass. 
Fig. 6. Two spines of dorsal fin of Polypterus bichir, showing the meer Aoteae 
rays. 
Fig. 7. Left ventral fin of ditto. 
Fig. 8, Anal fin of ditto. 

