GASTEROPODA. 63 



angle, and not immediately at the suture. The transverse striae are continued over 

 the ribs when the shell is perfect, but those prominent parts are often smooth. 

 The costae are in general vertical, though in some there is a slight curvature. The 

 specimens from Bramerton appear punctated, from an alteration and erosion of the 

 surface. A specimen from Bridlington, sent by Mr. Bean, with the name "plicatilis," 

 appears to be a variety of this species, which is very variable in its proportionate 

 dimensions as well in the fossil as in the recent specimens ; several shells, considered 

 as specifically distinct by Moller, are probably only varieties. 



13. Clavatula Teevelliana. Tart. Tab. VII, fig. 14 



Pleurotoma Travelliana. Turt. Mag. Nat. Hist. p. 351, 1834. 



— Thorpe. Brit. Mar. Conch, p. 197, fig. 52, 1844. 



— ■ Macgyllivray. Moll. Aberd. p. 172. 



Fusus (?) turricula, var. S. Wood. Catalogue 1842. 



CI. Testa ovalo-fusiformi, spird subturritd ; apice acuto ; anfractibus 5 — 6, convexis, 

 wbinjlatis, superne angulatis ; longitudinaliter costulatis, costulis confertis ; transversim 

 rugose striatis, cancellatis ; aperturd ovatd, canali brevissimd. 



Shell ovato- fusiform, with a slightly elevated spire, and acute apex ; whorls 5 — 0, 

 convex and rather tumid, angulated at the upper part ; longitudinally costulated 

 with numerous rather oblique and slightly prominent ribs, and large transverse strire 

 decussating and cancellating the exterior. 



Axis, \ an inch. 



Locality. Red Crag, Sutton. 



Mam. Crag, Bramerton. Recent, British Seas. 



This shell appears to correspond with the figure and description of what is con- 

 sidered a distinct species, and I have given it upon the authority of British con- 

 chologists, who may perhaps have better means of determining that point either 

 from colour or other character. I have but two or three specimens ; it may, how- 

 ever, be a variety of CI. turricula, as it is only in the proportions that I can observe 

 any difference between my fossil specimens of this species and those of turricula. 



14. Clavatula Boothii. Smith. Tab. VII, fig. 16. 



Pleurotoma purpurea. Bast. Mem. Geol. de Bord, pi. 3, fig. 10, 1825. 

 Fusus Boothii. Smith. Wern. Mem. vol. viii, p. 51, pi. 1, fig. 1, 1838. 



CI. Testa fusiformi, turritd, longitudinaliter, costatd ; anfractibus convexis, transversim 

 lineatis, lineis, elevatis, labro obtuso, intus nitido ; canali brevi subrectd. 



Shell turreted and fusiform, longitudinally costated; whorls convex, slightly 

 inflated, covered with elevated striae ; outer lip obtuse, smooth within ; canal short, 

 and slightly recurved. 



Axis, f of an inch. 



Locality. Red Crag, Walton Naze. Recent, British Seas. 



