GASTEROPODA. 53 



1. PLEUROTOMA INTORTA. Broc. Tab. VI, fig. 4, a, b. 



MUREX INTORTUS. Broc. Coq. foss. Subapenn. p. 427, t. 8, fig. 17, 1814. 

 PLEUROTOMA INTORTA. Grat. Tab. Coq. foss. Env. de Dax, p. 323, 1838. 



5. Wood. Catalogue 1842. 



Morris. Catal. of Brit. Foss. p. 157, 1843. 



Nyst. Coq. foss. de Belg. p. 509, pi. 41, fig. 2, 1844. 



PL Testa elongatd, turritd, subfusiformi ; longitudinaliter costatd; transversim striatd 

 vel sulcatd ; anfractibus superne excavatis ; carind nodosd; aperturd ovato-angustd ; labro 

 in/erne iricrassato; canali brevissimd. 



Shell elongato-fusiform, turreted, longitudinally costated, and transversely sul- 

 cated ; volutions carinated and nodulous, concave on the upper part ; aperture elon- 

 gato-ovate, with a very short canal ; outer lip thickened below. 



Axis, 2 j inches. 



Locality. Red Crag, Butley and Sutton. 



I have but two specimens of this species, one of which was found by my friend 

 the late Rev. G. R. Leathes. Both specimens are somewhat rubbed, but sufficiently 

 perfect to be identified with Brocchi's figure and the Belgian shell. The apex is 

 much worn, so that the number of volutions cannot be correctly ascertained. The 

 sinus appears to have been a little below the angle or keel of the volution ; and 

 longitudinal lines, or lines of growth, are slightly visible. 



2. PLEUROTOMA TURRICULA. Broc. Tab. VI, fig. 1, a b. 



MUKEX TURRICULA. Brocchi. p. 435, t. 9, fig. 20, 1815. 

 PLEUROTOMA TURRICULA. Bronn. Ital. tert. geb. p. 46, 1831. 



Philip. En. Moll. Sic. p. 199, 1836. 



Nyst. Coq. foss. de Belg. p. 520, pi. 41, fig. 5, 1844. 



PL Testa elongato-fusiformi ; anfractibus subcarinatis ; cingulis transversalibus tribus 

 remotis, elevatis, obtusis, interdum subcrenulatis ; interstitiis transversim et longitudinaliter 

 tenuissime striatis ; aperturd oblongd, canali angustd rectiusculd. 



Shell elongato-fusiform, whorls subcarinated, with three remote, elevated, and 

 obtuse, transverse bands, which are sometimes subcrenulated ; finely striated trans- 

 versely ; lines of growth visible ; aperture elongated, canal produced. 



Axis, 1^ inch. 



Locality. Red Crag, Sutton and Bawdsey. 



This is also a rare species. My cabinet contains about a dozen specimens, but 

 none in very good condition. I have in consequence been obliged to borrow parts of 

 the description of the shell from M. Nyst, the subcrenulations and fine striae not being 

 visible in my specimens, although, from their form and general character, I have no doubt 

 of the identity. The sinus is exactly at the angular part of the volution, above which 

 point it is rather concave, with an elevated band near the suture. The longitudinal 



