/8 PUOCEEDING-S OF TUE MALACOLOGICAL SOCIETY. 



spiral striatious ; the succeeding wliorls are spirally and longitudinally 

 striate. More mature forms ol: this species from Engiisli localities 

 show a greater development of sutni'al platform. 



Distribution. — This form is unknown in the Paris Basin, although 

 it is a frequent British fossil, being fonnd at Barton, in the Upper 

 Eocene, and occurring also in the Lutetian or Middle Eocene of 

 Bramshaw, Bracklesham Bay, Brook, and Huntingbridge. 



This specimen was collected from the south of Dime, and it forms 

 one of the duplicate specimens presented to the British Museum 

 (Nat. Hist.) by the Geological Survey of Egypt. 

 , Formation. — Lutetian (Middle Eocene). 



Locality. — South of Dime (H. J. L. Beadnell). 



Hemifusus erkans, Solander. PI. IV, Fig. 4. 

 Stromhus errans, Solander, Brander's Fossilia Hantoniensia, 1766, 



p. 23, pi. ii, fig. 42. 

 Fusus erra7is, J. de C. Sowerby, Mineral Conchology, vol. iv, p. 139, 



pi. 400, 1823; and in Dixon's Geology of Sussex, IBoO, pp. 104, 



185, pi. vii, fig. 31. 

 F. {Remifusus) errans, A. von Koenen, " Norddeutsche unter- 



Oligocan MoUusk.-Eauna " : Abhandl. geol. Specialkarte 



Preussen, etc., vol. x, p. 233, pi. xvii, fig. 5, 1889. 

 Chrysodomus errans, 11. B. Newton, Syst. List Edwards Coll., Brit. 



Mns., British Oligocene and Eocene Mollusca, 1891, p. 157. 

 Semi/tistis (Mayeria) errans, Cossmann, Essais de PaUocunchoIogie 



Comparee, 1901, pt. iv, p. 93, pi. iv, fig. 13. 

 Solander's original description of tliis shell is as follows : " Testa 

 striata, anfractibus carina acuta notatis. Testa oblongo-ovata, utrinque 

 conica, transversim striata, ventre anfractibusque omnibus carina acuta 

 notatis." 



Remarks. — "With the exception of mineralization the specimen 

 referred to this species is fairly well preserved. The general contour 

 is bieonical, while the spire, which is shorter than the aperture, is 

 sti'ikingly carinated on each volution, the posterior surfaces of which 

 are Avide and oblique, besides being depressed and spirally striated. 

 The spiral ridges of the body-whorl are coarser and thicker than in 

 European forms of the species, probably largely due to mineralization. 

 Crossing the spiral sculpture are numerous regularly arranged oblique 

 striations, which, however, are more evident on the bodj^-whorl than 

 elsewhere. 



A little fracturing lias taken place on the front aspect of the 

 specimen, although the straightness and smoothness of the columella 

 are to be observed, as well as the narrow elongate aperture which bends 

 slightly inwards at the base to form a moderately open and short 

 canal ; the posterior angulation is rather longer and more sloping than 

 in European examples, although it is noticeable that a fragment of 

 a Spondyloid shell has attached itself to the external surface of that 

 region of the aperture, thus producing a longer obliquity than may 

 really exist there. Length 50, diam. 30 mm. 



Listributioti. — The species has a wide distribution, being formd in 



