62 MOLLUSOA FROM THE CRAG. 



11. Clavatula LiEViGATA (?). Phil. Tab. VII, fig. 12, 12 a. 



Pleurotoma ljevigatum. Phil. En. Moll. Sic. vol. i, t. 11, fig. 1". 



CI. Testa fusiformi, turritd, subulatd; transversim tenuissime striata, anfractibus plani- 

 usculis, contiguis ; aperlurd longitudine totius testa trientem vix aquante; canali brevissimd. 



Shell turreted, tapering, and fusiform ; with an ovate or elongated aperture ; 

 whorls slightly convex, finely striated transversely, more coarsely so at the base, 

 with a short and wide canal, columella slightly incurved, outer lip sharp, and smooth 

 within. 



Axis, yq of an inch. 



Locality. Cor. Crag (?), Sutton. 



Red Crag, Walton Naze. Recent, Mediterannean. 



A few specimens only of this species have come into my possession, and those 

 unfortunately are not in good condition. Mr. Bowerbank has also lent me two 

 specimens from Walton Naze ; but they are unfortunately in no better condition 

 than my own. I feel, however, unwilling they should not be represented. It much 

 resembles Pleurotoma lavigatum, Phil. (vol. i, p. 199, t. 11, f. 17), and if it were not 

 for his description, " lavissima" I should have little doubt of their identity ; our 

 shell is distinctly striated over the body of the whorls, and more coarsely so around 

 the base. The obsolete costse are scarcely visible, from the bad condition of the 

 specimens, and there is a visible depression at the upper part of the whorl, caused 

 by a deep sinus a little below the suture. 



12. Clavatula turkicula. Mont. Tab. VII, fig. 13 «, 13 b. 



Murex turricula Mont. Test. Brit. p. 262, t. 9, fig. 1, 1803. 



— angulatus. Don. Brit. Shells, t. 156. 



— punctatus. Woodward. Geol. of Norf. t. 3, fig. 28, 1833. 



Pleurotoma clavula. Dujard. Mem. de la Soc. Geol. de France, 1837, torn, xi, pt. 2, p. 291. 

 Defrancia nobilis Mailer. Ind. Moll. Groenl. p. 12, 1842. 



— Woodiana - - - . p. 13. 

 Fosus plicatilts. Bean. MS. 



CI. Testa turricula, ovato-fusiformi ; anfractibus convexiusculis, superne angulatis ; 

 longitudinaliter costulatis ; transversim et rugose striatis ; aperturd ovatd, canali brevi. 



Shell turriculate, ovately-fusiform ; whorls about eight, slightly convex, angular 

 at the upper part ; longitudinally costulated, with 14 — 16 slightly elevated ribs in 

 the last volution, crossed by coarse transverse strias ; aperture subovate, ending in 

 a short and rather wide canal. 



Axis, f- of an inch. 



Locality. Red Crag, Sutton and Walton. 



Mam. Crag, Bramerton and Bridlington. Recent, British and North Seas. 



This is by no means a rare species in the Red Crag. It is rather an aberrant 

 form of this genus, having the sinus indistinctly marked by a slight indenture at the 



