Mr. A. Bell on the Crag-Fauna. 359 



convex at bottom, constricted towards the top ; suture 

 slight, forming a channel on the top of the whorl ; ribs stout, 

 but hardly i-aised above the surface ; mouth short, open, 

 canal short and broad ; pillar-lip straight, reflected, with 

 the callus massed into a pad at the top, which forms one 

 side of the labial notch; notch very large, broad, and deep ; 

 outer lip spreading. Long. -^ inch. C. C. Gedgrave. 



P. terehra, Dujardin, has a general resemblance to the 

 above ,• but the diagnosis and flgm-e are both too short for 

 comparison. A worn specimen obtained from the K,. C. 

 appears to belong to this species. 

 Mitra ehemiSj Lam. R. C. Waldringfield. 



*Ovida adriatica, Sow.''(Mon. Crag Moll. tab. 2. f. 16, Ovula 

 Leathesu, var.). A specimen in Mr. Jeffreys's collection 

 is hardly to be distinguished from a Crag shell found by 

 myself. It differs somewhat from the typical form in the 

 expansion of the lower part of the lip. In all other par- 

 ticulars they agree, R. C. Butley. 



^Nattca boreah's, Sow. (Beechey's Voyage, pi. 37. f. 2). R. C. 

 Butley. Norw. C. Thorpe, Suffolk. N. horealis bears the 

 same relation to N. gvoenlandica that is assumed by N. oc~ 

 clusa towards N. afjinis. 



* grcenlandica^ Beck. R. C. Shottisham. Norw. C. 



Thorpe, Suffolk. 



Alderi, E. F. R. C. Butley, Shottisham Creek, &c. 



Odostomia lactea, L. {Chemnitzia elegantissima, Mont.) 

 R. C. Walton-Naze. 



* {Chemnitzia) pUcatida J Broc. Conch, foss. Subap. t. 7. 



f. 5. R. C. Walton-Naze, Butley. 



( Chemn.) internodrda jY^ood. A shortly conical variety, 



unnoticed by Mr. Wood, is not \mcommon in both the C. 

 & R. C. 



(Chemn.) suturalis, Phil. R. C. Waldi'ingfield. 



obliqua, Alder. C. C. Sutton. 



Triforis perversa, L. C. C. Sutton. T. perversa and T. 



adversa both occur in the C. C. 

 Cerithiopsis tuhercularis, Mont. R. C. Shottisham Creek. 

 Vermetus (jlomeratus, Biv., = V. intortus, Mon. Crag Moll. 



1. 12. f. 8. 

 * triqueter, Biv. (Phil. En. Moll. Sic. t. 9. f. 21). R. C. 



Waldringfield. 



arenarius, L. C. C. Orford. 



Turritella 2}^anispira, S. Wood. R. C. Shottisham Creek. 

 * sidjangidata, Broc. Conch, foss. Subap. t. 6. f. 16. R. C. 



Waldringfield. 

 Ccecum mammillatum. S. Wood. R. C. Walton-Naze. 



