GASTEROPODA OP THE EOCENE MARLS. 287 



of species to the genus Ccdatura, on page 28 of the work cited above, he 

 includes forms evidently belonging to the Pyramidellidcs, and places them 

 next to Obeliscus, where they certainly belong. Then on page 35, in the same 

 list of species, under ActceonidcR, he groups it again, biit includes only one 

 of the two previously included species. Subsequently in the same volume, 

 on page 147, he changes the name from Ccelatura to Actceonema without stating 

 why the change is made, and gives a generic description, citing Pasithea 

 striata of Lea as the type, referring to a figure on PI. ii. Fig. 3, which is so 

 entirely different and unlike Mr. Lea's figure and species that there can be 

 no relation whatever between them, and which might readily be mistaken 

 for a poor figure of Tuha striata Lea, which I rather suspect it was originally 

 intended for. Further on, on page 213 of the same volume, he describes a 

 species from New Jersey under the name Actceonema prisca, figuring it on 

 PI. XXI, Fig. 3, which, in the condition in which he studied and figured it, 

 might very readily be mistaken for a specimen of Tuba striata Lea, but 

 which on closer examination proves to be an Actceon. Mr. Conrad's figure 

 of Pasithea striata Lea we are left to infer is of natural size, and is over 

 three-fourths of an inch long, with strongly rounded volutions, but Mr. Lea's 

 figure is of a shell seldom more than one-fourth of an inch long; has volu- 

 tions flattened .in the direction of the spire, and presents a distinct fold on 

 the columella. Considering the above facts I infer that Mr. Conrad orig- 

 inally intended to base his genus upon Pasithea striata Lea, and subsequently, 

 when he wrote the description, confounded his originally intended generic 

 type with Tiiba striata Lea, and still held that idea when describing the New 

 Jersey species .given below. Owing to this confusion in regard to the genus, 

 I have not recognized it as valid for either group, and especially as in either 

 case it would be a synonym. 



Action prisca. 

 Plate XXXVI, Figs. 7, 8. 



Actceonema prisca Conrad: Am. Jour. Conch., vol, 1, p. 313, PI. XXI, Fig. -3; 

 Meek, Geol. N. J., Newark, 1868, p. 732. 



Shell of about the medium size for the genus, the type specimen used 

 by Mr. Conrad in his description and figure measuring three-fourths of an 



