63 



A REVISION OF THE BRITISH EOCENE SCAPHOPOBA, WITH 

 DESCRIPTIONS OF SOME NEW SPECIES. 



By E. BuLLEN Newton, F.G.S., etc., and Geo. P. Harris, F.G.S., etc. 



Read January 12th, 1894. 



PLATE VI. Fig. 1. 



The British. Eocene Scaphopods, although they have in part been 

 treated of in various works devoted to tertiary palaeontology, 

 have never been brought together as a whole, and the literature of 

 the subject is so scattered that we thought some such conspectus as 

 here essayed would be useful. Moreover, the correct determination of 

 many of the species has for years rested on too theoretical a basis, the 

 types for the most part not being of English origin. The splendid 

 collection of English and Paris Basin tertiary moUusca in the Natural 

 History Museum, however, with the type specimens of some of 

 Sowerby's species, have enabled us to clear up these difficulties, and 

 we are also in a position to describe some new species. 



The classification adopted is based on that of Stoliczka, who paid 

 special attention to this class, but we have not been unmindful of 

 recent progress in the subject on the Continent. 



Family DENTALIID^. 



Genus DENTAL ITJM, Linnseus. 



Systema Naturte, 1767, Ed. 12, Vol. i. Part 2, p. 1263. 



Ti/2}e. — Dentalium elephantinum, Linnaeus (reference as above). 

 Posterior orifice truncated; not fissured; surface ornamented with 

 longitudinal ribs. 



Dentaxiijm: nitens, J, Sowerby. 



Dentalium nitens, J. Sowerby. — Mineral Conchology, 1814, vol. i. 

 p. 159, pL Ixx. figs. 1, 2. 



Dentalium, sp. G. B. Sowerby. — Quart. Journ. Geol. Soc. 1859, 

 vol. XV. p. 136, pi. V. fig. 5. 



Fustiaria nitens, E. B. Newton. — Syst. List Edwards Coll. British 

 Museum, 1891, p. 285. 



Shell "nearly straight; surface even and shining; aperture circular; 

 mouth expanded." — J. Sowerby. This is one of the rare Eocene forms 

 without any evidence of a fissure, hence we regard it as a Dentalium ; 

 it is, however, a perfectly smooth shell, and in that respect differs 

 from the type of the genus. Common. Type in the Natural History 

 Museum. 



Formations and Localities. — London Clay: Einchley, Haverstock 



VOL. I. — MARCH, 1894. 5 



