68 NOTE ON GENUS DIPTERODON. 



as is now generally recognized, are two well-known fishes occurring 

 in the Mediterranean and the seas of Europe generally, the C. chalets 

 being the Corvina nigra of Cuvier, and the C. hoops of Pallas being the 

 Umbrina vulgaris of Cuvier. 



The names Diptcrodon and Coracinus having been both used previously, 

 and consequently inallowable for another genus, and no other name 

 having been given to the South African fish, a new designation must 

 therefore be supplied. Bichistius is proposed as being applicable. The 

 relations of this fish have to be ascertained by study of the anatomy, 

 materials for which are not yet available in Washington. It does not 

 appear to be closely related to Pimelcpterus, as generally supposed. 



