RAPHITOMA TENUISTRIATA. 263 



spaces, as well as by excessively fine spiral striae, only visible by the aid of a lens ; 

 suture rather deep ; mouth oblong, angulate above ; outer lip thin, gently curved, 

 not expanded ; canal fairly long, narrow. 



Dimensions. — L. 5 mm. B. 2 mm. 



Distribution. — Recent: Mediterranean, including the Algerian Coast. 

 Fossil : Coralline Crag : Sutton. 



Upper Pliocene: Biot, Bologna, Alta villa, Val d'Era. Pleistocene: Livorno, 

 Valle Biaia, Reggio, Ficarazzi. 



Bsmarhs. — When examining Wood's collection of Coralline Crag fossils at the 

 Norwich Museum, I discovered an unnamed specimen of the charming little shell 

 here figured that had lain there unrecognised for thirty years. I consider it may 

 be identified with R. Payraudoti {Payrandeaui) of Deshayes. Except that the end 

 of the canal had been broken it seemed complete, corresponding satisfactorily with 

 the figures given by Philippi and Prof. Kobelt. It is a distinct species and easily 

 recognised. 



I believe the molluscan fauna of the Crag is much richer than is generally 

 supposed, and that future collectors will be able to add largely to our knowledge 

 of these deposits. During my twelve years' work at Oakley new things were 

 constantly turning up. I never visited that place without getting something I 

 had not found there before. 



Raphitoma tenuistriata (A. Bell). Plate XXIX, figs. 3], 32. 



1848. Clnvatula Ixviguta (?), S. V. Wood, Mon. Crag Moll., pt. i, p. 62, pi. vii, fig. 12. 



1871. Phurotoma tenuistriata, A. Bell, Ann. Mag. Nat. Hist. [4], vol. vii, p. 357. 



1872. Phurotoma tenuistriata, S. V. Wood, Mon. Crag Moll, 1st Suppl., pt. i, p. 41. 



Specific Characters. — Shell elongato-conical, regularly tapering; whorls 7 — 8, 

 smooth, nearly flat; ornamented by excessively fine spiral strias, hardly visible 

 without the aid of a lens ; spire sometimes equalling, at other times exceeding half 

 the total length, ending rather abruptly in a blunt apex ; suture slight ; mouth 

 comparatively short, oblong, acutely angulate above ; canal wide, very short ; 

 labial sinus inconspicuous. 



Dimensions. — L. 10 — 15 mm. B. 3 — 5 mm. 



Distribution. — Not known living-. 



Fos.ril : Coralline Crag : Boyton, Sutton. Waltonian : Walton- 

 on-Naze, Little Oakley. Newbournian : Sutton. 



B.emarlcs. — This shell, originally described doubtfully by Wood from some 

 imperfect specimens as Clavatida Isevvjata, was afterwards referred by him to a 

 new species, for which Mr. A. Bell had proposed, in 1871, the name of P. tenuistriata. 

 It appears to be a very distinct form which at present has only been noticed in the 



