1858.] LECKENBY KELLOWAY FOSSILS, YOEKSHTRE. 13 



Patella ? geaphica, Leckenby (Bean, MS.). PI. III. fig. 3a, 36. 



SheU. oval, obliquely conical ; apex very excentric, and marked 

 by many radiating impressed lines, which become somewhat obsolete 

 towards the margin. 



Locality. Castle Eock, Scarborough. 



Ceeithium abbeeviatum:, sp. nov. PI. III. fig. 12. 



Shell short, turreted, with about nine flattened volutions, and the 

 suture distinct ; height of the whorls only half their breadth, each 

 with four rows of encircling costse, and eight or nine elevated perpen- 

 dicular spinose ribs; the ribs pass across the volutions obliquely 

 from right to left ; each rib has four large, prominent, obtuse, but 

 rather irregular and unequal tubercles, which give to the shell a 

 rugged aspect. Length about 7 lines, of which one-fourth is occu- 

 pied by the aperture. 



Locality. The Castle Eock, Scarborough. 



Ceeithitjm Culleni, sp. nov. PI. III. fig. 13. 



Shell turreted, volutions eleven or twelve, compressed, somewhat 

 angular at their jimctions ; their height is three -fourths the breadth, 

 each having four rows of transverse costse, undulated by the twelve 

 or thirteen longitudinal ribs, and which iim perpendicularly from 

 the base to the apex. 



It differs from O. muricatum, to which it bears some resemblance, 

 in its less rapid volutional increase, and in the smaller number of its 

 longitudinal costae, which are also quite straight, and not bent ia the 

 middle of each volution, as in that species. 



Named after Mr. Peter CuUen, the indefatigable collector of fos- 

 sils at Scarborough. 



Locality. The Castle Eock, Scarborough. 



ChEMNITZIA LUiTEATA, Sp. HOV. PI. III. fig. 14. 



Shell turreted, smooth to the naked eye ; whorls eight or nine, 

 moderately convex, most delicately striated transversely, with an 

 elevated line at the top of each whorl ; the sutural line is well de- 

 fined. Length ^ in. 



CUCULL^A CLATHEATA, Sp. UOV. PI. III. fig. 4. 



Shell elongate, very iaeqmlateral ; beaks prominent, anteriorly 

 rounded, posteriorly impressed, truncated, and obtusely carinated ; 

 surface ornamented with numerous close small ribs (larger on the 

 posterior margin) crossed by the numerous concentric lines, giving 

 the shell a very decussated appearance. The anterior margin is not 

 marked with the more prominent ridge, usually occurring in this 

 genus. 



Locality. The Castle Eock, Scarborough. This species also occurs 

 in the Combrash below. 



Cfcull^a minima, sp. nov. PI. III. fig. 5. 

 Shell small, somewhat quadrate, ventricose, nearly equilateral. 



