276 PLIOCENE MOLLUSCA. 



attention to the subject. One of them (PL XXX, fig. 35) is the type form, the 

 other, smaller and more slender (fig. 36), the var. minor of Jeffreys. The Crag 

 shell (fig. 37) resembles the latter. 



Genus BELA (Leach) Gray, 1847. 

 Bela turricula (Montagu). Plate XXXII, figs. 7—11. 



1803. Mnrex turricula, Montagu, Test. Brit., pt. i, p. 262, pi. ix, fig. 1. 



1853. Mangelia (Bela) turricula, Forbes and Hanley, Brit. Moll., vol. iii, p. 450, pi. cxi, figs. 7, 8. 



1867. Pleurotoma turricula, Jeffreys, Brit. Conch., vol. iv, p. 395, pi. xci, fig. 7. 



1870. Mangelia turricula, S.V.Wood, juu., and F. W. Harmer, Rep. Brit. Assoc. (Liverpool), p. 90. 



1888. Pleurotoma turricula, A. Bell, Eep. Brit. Assoc. (Bath), p. 136. 



1912. Bela turricula, Dautzenberg et Fischer, Camp. Sclent. Pr. Monaco, vol. xxxvii, p. 41. 



Specific Characters. — Shell solid, oblongo-fusiform, spire remarkably turreted, 

 elongate, gradually tapering to a truncated point ; whorls but slightly convex, 

 strongly and squarely angulated, with a narrow step-like shelf below the suture, 

 the last longer than the spire ; suture not deep but well defined by a wavy line ; 

 ornamented by strong longitudinal ribs, rather prominent, slightly tuberculate 

 on the keel, straight below the shelf, curved on the last whorl, extending to 

 the suture and mouth, but not always to the base of the shell ; except the apex, 

 which is smooth, the surface is covered with well-marked regular, equal and equi- 

 distant spiral strise (well shown in my fig. 7) ; mouth oblong, angulated by the 

 keel ; canal short, wide, ending in a rounded notch ; outer lip angular above, not 

 expanded. 



Dimensions. — L. 15 — 20 mm. B. 5 — 8 mm. 



Distribution. — Recent: coasts of Great Britain and Ireland, Shetland (Jeffreys). 

 Denmark (Nordmann). Heligoland (Frey). Cherbourg (De Gerville). Boulonnais 

 (Bouchard-Chantereaux) . 



Fossil : Butleyan Crag : Bawdsey, Hollesley, Butley. Icenian — 

 Norwich zone : Bramerton, Thorpe, near Norwich, Yarn Hill, Beccles, probably 

 elsewhere. Weybourne zone : Weybourne. Isle of Man, Wexford gravels. 



Pleistocene : Middle glacial sands of Billockby ; Bridlington, March, Selsey, 

 Portland, Torbay, Scotland, Ireland. 



Remarks.- — The term " Bela " is now used for a distinct genus of small fusiform 

 shells with a northern or Arctic range, having an elongate and turreted spire, 

 a short canal, a flattened columella, a thin outer lip, the labial sinus being wanting 

 or nearly so ; of these, the British but not Arctic form B. turricula, has been taken 

 as the type ; the latter, however, forms no part of the group of specially northern 



