318 



EDWlN S. GOODRICH. 



It is not until we reach the Teleostomes that difficulties 

 arise. Davidoff ^ held that the girdle proper is represented 

 in the Bony Ganoids and Teleosts by the cartilage at the 

 anterior ends of the long pelvic bones, which themselves 

 would be homologous with the metapterygium (basiptery- 

 gium) of the Selachian fin. 



Weidersheim (11), considering the bones as metapterygial, 

 believes the girdle to be appearing in Polypterus as small 



Fig. H. — Ventral view of the pelvic girdle and fins of Aniia calva, Bou. 

 (Partly from Davidotf.) 



paired or median cartilages (Fig. G) at the tip of the pelvic 

 bones. A somewhat similar little piece of cartilage, occasion- 

 ally found at the anterior extremity of the pelvic supports of 

 the Chondrostei, is supposed to have the same significance, 

 llautenfeld (8), on the other hand, compares the basal sup- 

 port in the Ganoids to the propterygium of the Selachii. 

 Wiedersheim's view, that the minute paired or median 



' Davidoff, " Beit rage z. vergl. Anat. der Hinteren Gliedniasse der I'isclie." 

 ' Morpb. Jahrb..' vols, v, vi, and ix. 



