58 MOLLUSOA FROM THE CRAG. 



striated, the striae being carried over the ribs ; this character is not represented in 

 Brown's figure. The sinus in my specimens is at the suture, but not very distinct, 

 and there is a slight depression on the upper part of the whorl. It differs from 

 CI. perpulchra in being shorter, in having the volutions more tumid, and in its 

 coarser and more numerous striae. It is a much less elegant shell. 



4. Clavatula perpulchka. S. Wood. Tab. VII, fig. 4, 4 a. 



CI. Testa minutd,fusiformi, turriculd; spird elevatd; anfractibus convexis ; longitudi- 

 naliter costatis, transversim striatis ; striis 10 — 11 acutis, elevatis; labro extus incrassato, 

 intus IcBvi ; canali brevi ; sinu apud suturam prof undo. 



Shell small, turriculate, and fusiform ; with an elevated spire and convex volu- 

 tions; longitudinally costated; costae 11 — 12 in the last volution; transversely 

 striated ; striae sharp and elevated ; outer lip curved, and thickened on the outside, 

 with a large and deep sinus at the suture ; canal short, and very open. 



Axis, \ of an inch. 



Locality. Cor. Crag, Sutton. 



This species much resembles in form and size CI. linearis, but that shell has 

 fewer striae, and the ribs are narrower ; in this the ribs are broad, touching each 

 other at the base, leaving no space between them ; whereas, in CI. linearis, they 

 stand apart, and the transverse striae or ridges are fewer and sharper, with the 

 outer lip less curved, more contracted at the lower part, and having the sinus not 

 quite so deep as in this species. 



Imperfect specimens of this shell are by no means rare at the above locality. It 

 was considered in my catalogue only as a variety of CI. linearis, but, for the above 

 reasons, they are now separated. 



5. Clavatula costata (?). Da Costa. Tab. VII, fig. 6 a, 6 b. 



Buccinum costatum. Da Costa. Hist. Nat. Test. Brit. p. 128, tab. 8, fig. 4, 1778. 



Murex costa tus. Mont. Test. Brit. p. 265, 1803. 



Fusus costatus. Thorpe. Mar. Brit. Conch, p. 202, 1844 



Pletjbotoma mitbula (?). Nyst. Coq. foss. de Belg. p. 528, pi. 44, fig. 3, 1844. 



CI. Testa turritd, sub ulatd,fusiformi ; anfractibus 6 — 7 convewiusculis, costatis ; costis 

 circa septem, obliquis, obtusis, elevatis; inlerstitiis transversim tenuissime striatis; labro 

 acuto, extus marginato, intus incrassato ; canali brevi. 



Shell turriculate, tapering, subfusiform, with 6 — 7 slightly convex volutions ; 

 longitudinally costated; costae seven, oblique, elevated, and obtuse, transversely 

 striated, with an acute and curved outer lip, thickened within, particularly near the 

 sinus ; and marginated on the outside behind the lip. 



Axis, •§ of an inch nearly. 



Locality. Cor. Crag, Sutton. 



Red Crag, Sutton and Walton. ? Recent, British Seas. 



