42 SUPPLEMENT TO THE CRAG MOLLUSCA. 



In the ' Crag Mollusca ' I referred this shell doubtfully to Pleurotoma lavigatum of 

 Philippi, but the specimen there figured was not quite perfect. Mr. Bell has lately found 

 one or two in better preservation, to which he has given the name of PI. tenuistriata. 

 As I am satisfied that this shell is distinct from P. laevigata, I have given it here under 

 Mr. Bell's name. 



Pleurotoma laevigata, Phil. Supplement, Tab. VI, fig. 15. 



Localities. Red Crag, Walton and Butley. 



The above figure represents a specimen of what I believe to be the true form of 

 IcBvigata, found by myself in the Red Crag of Butley. Mr. Bell gives it also from 

 Walton Naze. 



Pleurotoma cylindracea ? Holler. 



Defkancia cylindracea, Mbller. Ind. Moll. Grcenl.,p. 13, 1842. 

 Mangelia cylindracea, Woodward. Geol. Mag., vol. i, p. 53, 1864. 



Locality. Upper Glacial, Bridlington? 



This is given in Dr. Woodward's Bridlington list with a query, but I cannot find a 

 shell among the Bridlington fossils that will correspond with Moller's description. 



Pleurotoma senilis, S. Wood. Supplement, Tab. V, fig. 5. 



Locality. Bed Crag, Waldringfield. 



The specimen figured was obtained by Mr. Canham from the Nodule pit at Waldringfield. 

 It is much rubbed and worn, and the striae are nearly obliterated. The costse on the 

 body whorl are, however, sinuated, from which I imagine it possessed a sinuated outer 

 lip. Not being able to give it a correct diagnosis, I have called it provisionally PI. senilis. 

 It is probably a derived specimen. 



Pleurotoma hispidula, Jan. Supplement, Tab. Ill, fig. 3. 



Rhaphitoma iiispidula, Jan., fide Bellardi. Mon. Foss. Pied., p. 92, t. iv, fig. 17. 

 Pleurotoma decussatum, Phil. En. Moll. Sic, vol. ii, p. 174, t. xxvi, fig. 23. 

 — A. Bell. Ann. and Mag. Nat. Hist., May, 1871. 



Spec. Char. " Testa fusiformi, plicis tenuibus longitudinalibus, lineisque transversis 

 elevatis distantibus reticulata ; anfractibus aque et parum convexis ; apertura oblonga, 

 spiram aquante.'' — Philippi. 



