﻿286 



EOCENE MOLLUSCA. 



The present species is found plentifully at Highgate, and I have dedicated it to my 

 friend Mr. Wetherell, so long and so well known for his zealous labours in the London 

 Clay, and his unrivalled collection of fossils from Highgate and the neighbourhood. 



Size. — Axis, 1 inch and 7-12ths ; diameter, 6-12ths of an inch nearly. 



Localities. — Highgate , Hollo way . 



No. 212. Pleurotoma fasciolata. F. E. Edwards. Tab. XXX, fig. 12, a, b. 



P. testa elongatd, fusiformi, sub-turritd, omnino spiraliter fasciolata : spird elevatd, in 

 longitudine bi-trientes totius testa superanti .- anfractibus planulato-convexis, suturd 

 perspicud divisis, ad humeros obtuse carinatis ; marginibus posticis latissimis, sub-rectis, 

 contra spiram expressis : fasciolis spiralibus confertis, crassis, rotundatis, sub-regularibus, 

 lineis incrementi fortiter asperatis ■• aperturd ovato-oblongd, antice in canali longiusculo, 

 patulo, exeunti; labro aliforme, acuto; sinu prof undo, latiuscido, ad humerum collocato. 



Shell elongated, fusiform, sub-turreted, having the whole surface covered with 

 narrow spiral bands ; spire pointed, produced, fully equalling three fifths of the 

 shell in length ; whorls, seven or eight exclusive of the pullus, flatly convex on the 

 sides, separated by a deep, perspicuous suture, and bearing on the shoulders a wide, 

 slightly prominent keel, rounded on the upper surface, from which the spire derives 

 its turreted appearance ; the posterior margins are very wide, nearly straight, and 

 extend up the spire almost to the keel on the preceding whorl ; the spiral bands are 

 numerous, thick, rounded on the upper surface, nearly regular, and much roughened, 

 almost cancellated, by the coarse, prominent lines of growth. The aperture is of 

 an oblong-oval form, and terminates in front in a wide, moderately long canal ; the 

 outer lip is much arched, and presents at the shoulder a deep and rather wide sinus. 



Size. — Axis, 1 inch and 9-12ths; diameter, 7-12ths of an inch nearly 



Localities. — Highgate, Railway Tunnel, Kilburn. 



No. 213. Pleurotoma denticula. Basterot. Tab. XXX, fig. 7, a — //. 



Pleurotoma denticula. Bast. 1825. Descr. Geol. du Bass. tert. Sud-ouest de la France, 



p. 63, t. 3, fig. 12. 



— — Defr. 1820. Diet, des Sciences nat., vol. xli, p. 396. 



— — Grat. 1832. Tab. des Coq. foss., &c, de Dax, p. 320, No. 318. 



Grat. 1838. Catal. zool., &c, du Bass, de la Gironde, p. 46, 

 No. 388. 



— — Desm. 1842. Rev. de Pleurot., p. 47, No. 25. 



