Plate X 



Firr. 1. The superficial bones of tlie riglit or upper side of the head of the Common 

 Sole. 



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



Eeference letters : — 



Fic 3. The bones of the branchial arches and 

 Fig. 4. The bony branchial arches spread out 

 Eeference letters and numbers : — 



paired fins, lateral view. 



and seen from the dorsal side. 



14, 2nd cpibrancliial. 



16, 2nd hypobrancliial. 



17, 8rd pliaryngoliraiicliial. 



18, 3rd cpibrancliial. 



19, 3rd ccratobrancliial. 



20, 3rd hypobrancliial. 



21, 4tli epibrancliial. 



25, po.st-temporal. 



26, supra-clavicular. 



27, clavicle. 



28, jugular. 



29, scapula. 



30, coracoid. 



31, pubic. 



Fig. 5. The skull, showing the separate bones and their suiures, 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. 



Eeference letters : — 



6.0. basioccipital. 



s.o. supi-aoccipital. 



e.x.o. exoccipital. 



ep.o. epiotic. 



pl.o. pterotic. 



op.o. opisthotic. 



pr.o. prootic. 



sp.o. spbenotic. 



jia. parietal. 



l.f. left frontal. 



r.f. right fi-ontf.l. 



pa.s. paraspbcnoid. 



vo. vomer. 



men.e. uiesethmoid. 



r.ect.c. right cctethnioid. 



l.cct.c. left ditto. 



