222 PLIOCENE MOLLUSCA. 



Pleurotoma, T\-itli a fairly long, straight and narrow canal (see Homes, Foss. Moll. 

 Tert. AVien, pi. lii, fig. 9). I do not think our Crag fossil is the same as the latter. 



Var. speciosa, nov. Plate XXVII, fig. 19. 



Varietal Characters. — Differs from the type in its very slender form, more 

 elongate spire and more delicate sculpture. 



Dimensions. — L. 16 mm. B. 5 mm. 



Distribiitio)! . — Not known living. 



Fossil : Coralline Crag : Gedgrave. 



liemarlcS. — This very charming little shell is from the Jermyn Street Museum. 

 It seems to group itself with figures 16, 17 and 18 of PI. XXVII, and may be 

 regarded, I think, as a variety of D. icenorvm. 



Drillia incrassata (Dujardin). Plate XXVII, fig. 28. 



1837. Pleurotoma incrassata, Dujardin, Mem. Couch. Tour., p. 292, pi. xx, fig. 28. 



1838. Pleurotoma Maravigme, Bivona, Spec. Nov. Pleur., p. 8, pi. i, fig. 3. 



1844. Pleurotoma elegans, Philippi, Enum. Moll. Sicilise, vol. ii, p. 168, pi. xxvi, fig. 5. 

 1848. Pleurotoma incrassata, Homes, Foss. Moll. Tert. Wien, vol. i, p. 383, pi. xl, fig. 14. 

 1871. Conopleura Maravignse, Jeffreys iu Prestwich, Quart. Journ. Geol. Soc, vol. xxvii, p. 488. 

 1873-5. Conopletira elegayis, Seguenza, Boll. E. Com. Geol. Italia, vol. iv, p. 298, no. 119, 1873; 



C. Maravignie, vol. vi, p. 206, no. 171, 1875. 

 1877. Drillia incrassata, Bellardi, Moll. Terr. Terz. Piem., pt. ii, p. 140, pi. v, fig. 1. 

 1879. Drillia incrrassata, Fontannes, Moll. Plioc. Vail, du Rhone, p. 46. 

 1890. Crassopleura Maravigna', Carus, Prod. Faun. Medit., vol. ii, p. 414. 

 1914. Drillia (Cymatosyrinx) incrassata, CipoUa, Palaeont. Ital., vol. xx, p. 122, pi. xii, fig. 10. 



Specific Characters. — Shell small, slender in the type form ; spire elongate, 

 ending in a blunt apex ; whorls but slightly convex ; ornamented with oblique or 

 sinuous costee extending to the base of the shell, which in the type are fine and 

 numerous, Ijut in the various varieties are less so ; suture slight ; mouth short, oval, 

 wide ; inner lip thickened with a small pad at the top forming one side of the 

 labial notch, which is deep and well marked ; canal wide, open, very short. 



Dimensions. — L. 10 mm. B. 3*5 mm. 



Distribution. — Recent : Mediterranean, Adriatic, JEgean, Algeria, Tunis, 

 Atlantic coasts of Spain and Portugal. 



Fossil: Coralline Crag : Gedgrave (Jeffreys). Walton ian : Little 

 Oakley. Newbournian : Sutton. 



Miocene : Touraine, Italy (all zones), Vienna basin. Lower Pliocene : Italy — 

 Albenga ; France — Rhone Valley. Upper Pliocene : Italy — Asti ; Sicily — Altavilla. 

 Pleistocene : Palermo, Reggio, Gravina, Calabria. 



