Mr. A. Bell on the Crag-Fauna. 357 



vol. ii. pi. 1. f. xi. The Crag form is larger than the 

 American (type) shell, and is represented in size by Spitz - 

 bergen and Arctic specimens. I have had the pleasure of 

 comparing the Crag shell with the recent species, through 

 the kindness of Mr. Jeffreys. R. C. Butley. 



Pleurotoma 'perpidchra^ S. W. R. C. Walton-Naze. 



Bertrandi^ Payraudeau, Cat. des Moll. etc. Corse, t. 7. 



f. 12^13. R. C. Bentley, Foxhall, &c. ' 



decussata, Philippi, En. Moll. Sic. t. 26. f. 23. Phi- 



lippi's figure gives the cancellations rather coarser than is 

 shown by the Crag shells ; but, as these latter vary, I do 

 not think there can be any doubt as to the identification 

 being correct. C. C. Gedgrave. 



— harjmlariaj Couthouy, Bost. Journ. N. H. vol. ii. p. 1, 

 f.lO. R. C. Butley. 



tenuistriata, A. Bell, = Clav. Icevigata^ S. Wood, non 



Philippi. C. C. Sutton. 

 — j9?<c|^7-a, S.Weod. C. C. Sutton. 



" " Phil. En. Moll. Sic. t. 26. f. 26. C. C. Ged- 



grave. 



— pannuniy Basterot (Bellardi, Mon. Pleur. Piemonte, 

 t. 2. f. 5),=P. semicolon^ var. (S.Wood). 



— violacea^ Mighels. R. C. Butley. 

 var. giganteaj =P. arctica?, Adams. Out of 



three specimens seen by myself all are deficient in the 

 upper whorls. Judging from size and sculpture, they are 

 the same as Morch's variety, but are all less ventricose 

 than their recent analogues. R. C. Waldringfield. 

 exarata, Moll. R. C. Butley. 



*?- gracile, Phil. En. Moll. Sic. t. 11. f. 23. R. C. Wald- 

 ringfield. 



*? pggmamm, Phil. En. Moll. Sic. t. 26. f. 25. One 



specimen, in bad condition, but having the characters 

 well marked, is all I have at present. R. C. Shottisham 

 Creek. 



* graclUor^ A. Bell, n. sp. Shell elongately fusiform, 



attenuated, fragile ; whorls 8-9, convex; ribs oblique, 9 or 

 10 on the body-whorl, with spaces between each, of the 

 same breadth as the ribs ; spire pointed ; sutm-e deep ; 

 mouth long and naiTOw, canal straight ; pillar slightly 

 flcxuous ; labial notch rounded, situate between the suture 

 and the shoulder of the whorl, the whole covered with fine 

 striae. Long. -pV inch, lat. -^ in. C. C. Gedgrave. 



* stn'olata, Scac. R. C. Shottisham Creek. 



curtistoma, A. Bell, n. sp. Shell (adult) nassa^form 



whorls 9, moderately convex, ribbed from fourth top whorl 



