• GASTEROPODA. 61 



9. Clavatula cancellata. /. Sow. Tab. VII, fig. 9. 



Fusus cancellatus. J. Sow. Min. Conch, t. 525, fig. 2, 1827. 

 Pleuhotoma cancellata. S. Wood. Catalogue 1842. 



CI. Testa turritd elongato-fasiformi; anfractibus G — 7, convexis ; superne planatis, 

 depressis, longitudinaUler costatis et transversim striatis clathratis ; papillis in angulis 

 sectionem acutis ; canali longiusculd, subrectd. 



Shell slender, fusiform, and elongate; apex acute; spire elevated, with 6 — 7 

 convex volutions, covered with decussating ridges, which are sharp and elevated at 

 the point of contact ; aperture ovate ; canal moderately long, very slightly recurved. 



Axis, f of an inch. 



Locality. Cor. Crag, Sutton. 



Red Crag, Walton Naze. ? Recent, Mediterranean. 



This elegant shell is at present rare from both formations. The sinus is rather 

 broad, producing a flattened or smooth canal around the spire, immediately at the 

 suture. The whorls are covered with longitudinal ribs, and with transverse ridges, 

 elevated and spinous at the points of junction. The lower part of the aperture is 

 slightly contracted, forming a distinct canal, which is open and very slightly re- 

 curved. This is probably only a variety of Pleurot. reticulata, Bronn., Murex ec/dnatus, 

 Broc. (Tab. 8, fig 3), Pleurot. Cordieri, Payr. 



10. Clavatula Concinnata. S. Wood. Tab. VII, fig. 11 a, 11 b. 



Plecbotoma rufa (?). S. Wood. Catalogue 1842 



CI. Testa turriculd, elevafd,fusi,formi ; anfractibus convexiusculis, prope suturam obsolete 

 angulatis ; longitudinaliter oblique plicatis, plicis 10-— 13 ; transversim striatis; aperturd 

 elongato-ovatd ; labro acuto ; canali breviusculd. 



Shell turriculate, elevated, and fusiform ; with an obsolete angularity a little 

 below the suture ; longitudinally plicated ; plicae or ribs oblique ; crossed and can- 

 cellated by coarse and elevated strias, between which are finer lines ; outer lip sharp ; 

 canal moderate. 



Axis, 1 inch. 



Locality. Cor. Crag, Sutton and Gedgrave. 



This is not a very abundant shell, and is seldom perfect. The large figure is 

 from a specimen belonging to Mr. Perry. The outer lip curves a little, giving an 

 elegant obliquity to the folds, and the sinus is shallow a little below the suture. It 

 is crossed by about six or seven elevated lines, which decussate the exterior, and 

 the shell is covered between these with finer lines. It somewhat resembles the 

 figure of F. rufus, Gould (Invert. Massach., p. 290, f. 192), but differs from the 

 British shell M. nifus, Montague. It is, however, possible that it may be only an 

 extreme variety of C. turricula. Fig. 11 b is a more elongate variety. 



