K. TATE ON THE LIAS ABOUT RADSTOCK. 



507 



the base ; base convex, ornamented with about seven broad concen- 

 tric ribs, and radially striated. Height *3 inch ; breadth *2 inch. 

 One example, in a derived nodule. Conglomerate bed, Munger. 



Ceypt^inia aeeinis, spec. nov. Figs. 1, la. 



Shell shining, subdepressed, imperforate ; whorls subconeave, orna- 

 mented with slender longitudinal ribs (about twenty), last whorl 

 bluntly keeled ; base convex, with a few longitudinal threads below 

 the keel, the rest covered with fine concentric strise ; callus small 

 and circumscribed. The sutural band is narrow, longitudinally 

 ribbed, and marginal. 



Allied to C. eocpansa, but has a different ornamentation and is 

 more conical. Height *6 inch ; diameter *7 inch. 



Zone of Am. Jamesoni, S. of Paulton. Two examples (Geol. 

 Surv.). 



Figs. 1-5. — Mollusca from the Lias about Radstock. 



1. Cryptcenia affinis ; la. Portion of body-whorl enlarged. 2. Trochus solita- 

 rius. The line shows the natural size. 3. Cardinia rugulosa. 4. Cardita 

 5. Belemnite, monstrosity. 5 a. Section of the same. 



Caedita consimilis, 



4. 



spec. nov. Fig. 



Shell ovately tetragonal, transverse, compressed, umbones small, 

 anterior, incurved; surface ornamented with radial costee (more 

 than sixty), and a few imbricating folds of growth. 



Of the many scores of specimens of C. multicostata, Phillips (Car- 



