Mr. A. Bell on the Crag-Fauna. 355 



= C. huccmoidesj Couth, Bost. Journ. Nat. Hist. vol. xi. 

 pi. 3. f. 3), differs somewhat from the tyjiical Crag form 

 in being shoi;ter, broader, with the costte more erect, closer, 

 and less ]n-onounced. The two forms occur in the R. C. 

 at Waldringfield &c. 

 Tritonium viridulum^ Fabr., comprises both varieties. 

 '^Fusus americanus, A. B. R. C. Waldringfield. 



cordatus^ A. B. (Mon. Cr. Moll., F. gracilis^ var. /3, t. 6. 



f. 10 ^). I have separated this variety from the typical 

 form because the shell is covered from the apex to (nearly) 

 the base of the canal with strong, corded, broad strife, and 

 is less variable in outline, is more slender, and has the 

 canal less recurved than the ordinary form ; apex blimt, 

 but not mammillated. 



-, var. contrarins. R. C. Woodbridge. 



'^Trophon barvicensts, Johnst. R. C. Walton, Shottisham 

 Creek, &c. 

 Terehra canalis, S. Wood. To distinguish the next species 

 from this, I subjoin a description of the shell, Mr. Wood 

 not having given one in the Mon. Crag Mollusca : — 



Shell dextral, conical, with a broad base ; spire pointed, 

 apex rather obtuse; whorls 11-13, sides nearly ^«^, the 

 upper ones plicated ; surface finely striated from apex to 

 base ; body-whorl rapidly contracting below ; outer lip 

 shar|3, spreading towards the canal ; canal recurved, open ; 

 pillar twisted, suture distinct. Long. 1| inch. 



Columhella minor^ Philippi, differs from this shell in 

 size only. 

 *Te?'e57*« ea;i7is, A. Bell, n. sp. Shell dextral, slender^ apex 

 obtuse or slightly mammillated ; whorls 12-14, convex, 

 contracting towards the top, suture well marked; plaits 

 slight on upper whorls, finely striated longitudinally ; 

 columellar lip reflected ; mouth small ; canal recurved. 

 Long. 1 inch. 

 Nassa fygmoia, Lam. R. C. Butley. 



* granifera, Dujardin, Mdm. Soc. G^ol. France, vol. ii. 



pi. 20. f. 11, 12. C. C. Gedgrave. 



Ascanias, Brug. R. C. Waldi-ingfield &c. The 



Mediterranean representative of N. incrassata. 

 — pidcliella, A. Bell, n. sp. Shell ovate, turriculate ; 

 whorls 6, convex, plicated, deeply striated or grooved, 

 groovings passing across the plaits, which are carried to 

 the base of the shell ; spire short, terminating in a point ; 

 suture deep ; moutli roundly dilated below, acute above ; 

 outer lip slightly thickened ('?), fluted in the interior by 

 11-13 narrow plaits; inner lip thickly enamelled, with a 



