PLEUROTOMA CONTIGUA. 377 



Genus PLEUROTOMA, Lamarck {continued from p. 210). 

 Pleurotoma contigua (Brocchi). Plate XXXIX, figs. 1, 2. 



1814. Murex contiguus, Brocchi, Couch, foss. subap., vol. ii, p. 433, pi. ix, fig. 14. 



1872. Pleurotoma contigua, A. and R. Bell, Proc. Geol. Assoc, vol. ii, ]). 213. 



1877. Pleurotoma contigua, Bellardi, Moll. Terr. Terz. Pieiii., pt. ii, p. 38, pi. i, fig. 24. 



1890-1904. Pleurotoma contigua, Sacco, Boll. Soc. Geol. Ital., vol. ix, p. 265, no. 3928, 1890; Moll. 



Terr. Terz. Piem., pt. xxx, p. 42, 1904. 

 1896. Pleurotoma (Hemipleurotoma) contigua, Cossmann, Ess. Paleoconch. com par., vol. ii, p. 80. 

 1915. Pleurotoma contigua, F. W. Harmer, Plioc. Moll. Gt. Brit., pt. ii, p. 205. 



Distribution. — Not known living. 



Fossil : Miocene, Pliocene : Italy. Scaldisien : Belgium. 



Remarks. — This form, occurring in the Miocene and Pliocene of Italy, is nearly 

 related to P. turricula, the principal difference appearing to be that in it the 

 central spiral ridge on each whorl is distinctly granulate, whereas in P. turricula 

 such granulation, where present, is very fine and is confined to the upper part of 

 the shell. Some authorities regard P. contigua as a variety of the latter, while 

 Brocchi, its original describer, Prof. Sacco, with Prof. Issel, M. Cossmann and 

 other authorities treat it as specifically distinct. On p. 205 of the present Memoir 

 I expressed a doubt whether it should be included in our lists of Crag fossils ; most 

 of our specimens are too much worn to show the distinguishing sculpture. I have 

 obtained an unworn example, however, from the Scaldisien of Antwerp, which I 

 have here figured and believe to be P. contigua. If it is correctly identified the 

 latter may turn up any day in our Crag deposits ; in that case my Belgian fossil 

 may be useful for comparison. 



Genus DRILLIA, Gray {continued from p. 230). 

 Drillia Jeflreysii, sp. nov. Plate XXXIX, fig. 35. 



1869. Pleurotoma galerita, Jeffreys, Brit. Conch., vol. v, p. 221, pi. cii, fig. 6. 

 1899. Drillia semicolon, Norman, Ann. Mag. Nat. Hist. [7], vol. iv, p. 134. 



Specific Characters. — Shell minute, delicate, fusiform ; whorls 6, angulated in 

 the centre, slightly concave above, the last excavated below ; ornamented by a single 

 row of strong oblique tubercles on the keel with fine lines above it, a ridge next 

 the suture and stronger ridges on the body-whorl below it; spire short, conical, 

 mouth oval, angulate, with a small notch above ; outer lip angulated by the keel ; 

 canal short, narrow, 



