﻿302 



EOCENE MOLLUSCA. 



No. 226. Pleurotoma flexuosa. Miinster. Tab. XXXII, fig. 8, a — c. 



Pleurotoma flexuosa. Munst. 1835. Leonh. and Bronn, Jahrbuch, p. 449. 



— — Gold/. 1826—1844. Petrefacta Germ., vol. iii, p. 21, t. 171, 



fig. 7. 



P. testa elongato-fusiformi, longitudinaliter flexuoso-plicatd, spiraliter line aid : spird 

 elatd, sub-conicd : anfractibus depresso-convexiusculis ; postice ad suturam sulco angusto 

 exaratis, lineato-marginatis, nonnunquam granulatis : aperturd oblongo-ovali, antice in 

 canalem breviusculum, ad basin emarginatum, productd ; labro leviter arcuato, ad liumerum 

 late sinuato ; sinu mediocr iter prof undo, triangulari. 



A long, narrow, fusiform shell, ornamented with numerous longitudinal plications 

 and spiral raised lines ; the spire is pointed and elevated, forming almost three fifths 

 of the entire length. The whorls, seven without the pullus, are depressedly convex, 

 nearly flat-sided, imparting a conical aspect to the spire ; the posterior margins are 

 rather deeply, but not widely, channeled, and are bordered round the suture by a sharp, 

 prominent line, generally simple, but sometimes crenulated by the lines of growth ; the 

 last whorl is much contracted towards the front, and terminates in a wide and short, 

 but distinct, canal, slightly notched at the extremity. The longitudinal plications are 

 narrow and curved, and extend from the sutural border to the middle of the whorl ; 

 the spiral lines are numerous, slender, nearly equal, and rounded on the surface. The 

 aperture is of an oblong-oval form, the outer lip very slightly arched, and the sinus, 

 which is on the shoulder, is wide, not very deep, and triangular in shape. 



The present species presents a close analogy with P. Prestwichii, but it is a 

 narrower and slenderer shell, with a longer spire and less convex whorls, a straighter 

 outer lip, and a shorter anterior canal. Our English specimens agree closely with a 

 specimen of P. flexuosa from Hermsdorf, part of a series from the older Tertiaries of 

 Germany, presented by Dr. Wedding to the British Museum. 



Size. — Axis, 8-12ths of an inch; diameter, 3-12ths of an inch, nearly. 



Localities. — Shenfield, Southampton, Clarendon, Highgate? Alum Bay (No. 4, 

 Prestw.) German: Sternberg (fide Goldf.), Hermsdorf (fide Wedding). 



No. 227. Pleurotoma pupoides. F. E. Edwards. Tab. XXXII, fig. 11, a, b. 



P. testa elongato-fusiformi, omnino concentrice sulcata : spird elatd, conoided : anfrac- 

 tibus sub-convexis, inermibus, postice cava lis ; ultimo anfractu ad humerum fascwld angustd 

 cincto, antice in canalem brevem obliquum prolongato ; sulcis concentricis confertis, regu- 



