| OCR Text |
Show 48 PROF. T. H. HUXLEY ON CERATODUS FORSTERI. [J The left pectoral fins of Ceratodus forsteri, Notidanus cinereus (fcetal), Scyllium canicula, Chimeera monstrosa, and Polyodon folium. The praeaxial (Pr.a) and postaxial (Pt.a) margins of all are turned in the same direction; B, the praeaxial ray (propterygium of Gegenbaur); Mt, the metapterygium; I, the basal or proximal joint of the axial skeleton. while it would have to be turned in the contrary way to bring it into the amphibian position. Hence the praeaxial edge in the teleostean fin is dorsal, while in the amphibian limb it is more or less ventral |
