176 CHARLES Rk. EASTMAN 
the specimen for which Safford proposed the name ‘ Gefalodus 
Ohioensis”” was a true P. alleghaniensis; but this cannot be 
settled from the description, which is wholly insufficient, and _ 
the rough sketches of the tooth are not only unrecognizable, but, 
as Dr. Hay himself intimates, probably erroneous. Such being 
the case, it is in accordance with the ordinary rules of nomen- 
clature that Professor Safford’s term should lapse. 
CHARLES R. EastTMAN, Pu.D. 
MUSEUM OF COMPARATIVE ZOOLOGY, 
Cambridge, Mass. 
