Pj^ati: X 



Fig. 1. The superficial bones of the right or iqiper side of the head of the Comiuon 

 Sole. 



Fig. 2, The superficial bones of the left or lower side. 



Reference letters : — 



px, 



0, 



po, 

 to, 

 so. 



quadrate. 



maxilla. 



premaxilla. 



opercular. 



])reopercular. 



interopercular. 



snbopercular. 



Fig. 3. The bones of the branchial arches and paired fins, lateral view. 

 Fig. 4. The bony branchial arches spread out and seen from the dorsal side. 



Reference letters and numbers 



14, 2ud epibraiichial. 



16, 2nd hypobranciiial. 



17, 3rd pliarynfTobrancliial. 



18, iJrd epibrauchial. 



19, 3rd ceratobraiichial. 

 '20, 3rd hypobraiK-liial. 

 21, 4th epibrancliial. 



25, post-temporal. 



26, supra-clavicular. 



27, clavicle. 



28, jugular. 



29, scapula. 



30, coracoid. 



31, pubic. 



Fig. 5. The skull, showing the separate bones and their sutures, from the right side. 

 Fig. 6. The same from the left side. 

 Fig. 7. The same from the dorsal side. 



Fig. 8. The posterior surface. 

 Reference letters : — 



jia. parietal. 



l.f. left frontal 



r.f. right fiontf.l. 



pa.s. parasphenoid. 



vo. vomer. 



■tnes.e, mesethmoid. 



r.ect.e. right cctethiuoid 



l.ect.e. left ditto. 



iilll 



