PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 149 
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The specimens have been presented to the United States National 
Museum. 
SAN DIEGO, CAL., April 10, 1880. 
ON SOME NEW SPECIES OF EOCENE MOLLUSCA FROM THE SOUTH- 
ERN UNITED STATES. 
By ANGELO HEILPRIN. 
A part of the species herein described have been for several past years 
among the collections of the United States National Museum. Those 
which are mentioned as coming from Texas were collected by Mr. G. W. 
Marnoch, who sent them some years ago to Dr. C. A. White, and were 
by the latter gentleman presented to the National Museum. The num- 
ber following the description of each species is that by which it is re- 
corded in the museum register. 
PLEUROTOMA, Lam. 
PLEUROTOMA PAGODA, 0. Sp. 
Plate, fig. 1. 
Ventricose; whorls about nine, the body-whorl nodulated on its most 
convex portion (nearly central), the nodulation consisting of a single 
series of sharp, obtusely-pointed, and flattened spines or nodes, which 
frequently appear double by the crossing of an impressed line over their 
basal portion; upper volutions with a similar series of nodes almost im- 
mediately above the sutural line, and gradually dwindling off into a cren- 
ulation; upper surface of the whorls concave, faintly striated, the sinual 
ruge indicating but a faint sinus; lower surface with numerous well- 
developed revolving lines, which show a tendency to alternate. Aper- 
ture exceeding the spire in length, considerably contracted at about its 
center. 
Length, 1/inch. (No. 1505.) 
Eocene of Alabama. 
This species in its general appearance greatly resembles certain forms 
of Fusus, and a comparison of more numerous specimens may show it 
to belong to that genus, although the ornamentation of the whorls, as 
well as the sinual indication, more clearly point to Plewrotoma. The 
