GASTEROPODA OF THE EOCENE MARLS. 237 
of species to the genus Celatura, on page 28 of the work cited above, he 
includes forms evidently belonging to the Pyramidellide, and places them 
next to Obeliscus, where they certainly belong. Then on page 35, in the same 
list of species, under Acteonide, he groups it again, but includes only one 
of the two previously included species. Subsequently in the same volume, 
on page 147, he changes the name from Celatura to Acteonema 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 Pl. 1, 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 Tuba 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 Acteonema prisca, figuring it on 
Pl. xxi, Fig. 8, which, in the condition in which he studied and figured it, 
might very readily be mistaken for 4 specimen of Tuba striata Lea, but 
which on closer examination proves to be an Acteon. 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 Tuba 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. 
ACTZON PRISCA. 
Plate xxxv1, Figs. 7, 8. 
Acteonema prisca Conrad: Am. Jour. Conch., vol. 1, p. 218, Pl. xxi, Fig. 3; 
Meek, Geol. N. J., Newark, 1868, p. 782. 
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 
