PKOCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 149 



Anal fin, distance from snout 4.7 



Caudal, length 18 



Pectoral, length 24 



Ventral, length 17 



Fin rays : 



Dorsal XXXII 



Anal 11,20 



Scales in lateral line 38 



The specimeDS have been presented to the United States National 

 Museum. ^ 



San Diego, Cal., A2)ril 10, 1880. 



ON SOITIE: NE^V species of eocene MOI.I.USCAFKOM THE SOVTH- 

 EBN UNITED STATES. 



By ANOELO HEILPRIIV. 



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. 



PLEUEOTOMA, Lam. 

 Pleurotoma pagoda, n. sp. 



Plate, tig. 1. 



Veutricose; 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 offinto acren- 

 ulation; upper siu-face of the whorls concave, faintly striated, thesinual 

 rugai indicating but a faint sinus ; lower surface with numerous well- 

 develoi^ed 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 greatlj' resembles certain forms 

 of Fusus, and a comi^arison of more numerous specimens may show it 

 to belong to that genus, although the ornamentation of the whorls, as 

 Avell as the sinual indication, more clearly point to Pleurotoma. The 



