124 PLIOCENE MOLLUSCA. 



Those marked * have been recently discovered by Mr. Bell during a visit to 

 the Isle of Man, or by the Rev. S. N. Harrison. 



Genns OCINEBRA, Leach, 1847. 



Ocinebra erinacea (Linne). Plate XII, figs. 12 — 14. 



1758. Buccinum erinaceus, Liuut', Sjst. Nat., ed. x, p. 736, no. 390. 



1853. Murex erinaceus, Forbes aud Hanley, Brit. Moll., vol. iii, p. 370, pi. cii, fig. 4. 



1867. Murex erinaceus, Jeffreys, Brit. Conch., vol. iv, p. 306, pi. Ixxxiv, fig. 1. 



1872. Murex erinaceus, S. V. Wood, Mon. Crag Moll., 1st Suppl., p. 31, tab. ii, fig. 11. 



1873-5. Murex erinaceus, Segueuza, Boll. E. Com. Geol., vol. iv, p. 346, 1873 ; vol. vi, p. 282, 1875. 



1882. Murex (Ocineira) erinaceus, Bucquoy, Dautzenberg et DoUfus, Moll. Mar. Eouss., vol. i, p. 21, 



pi. ii, fig. 1. 

 1885. Ocinebra erinaceus, Carus, Prod. faun. Medit., vol. ii, p. 385. 

 1901. Murex erinaceus, Kobelt, Icon, schalentrag. europ. Meeresconcb,, vol. i, p. 9, pi. ii, figs. 5 — 8; 



pi. iii, figs. 8, 9 ; pi. iv, figs. 2 — 9. 

 1903. Ocinehra erinacea, Cossmaun, Ess. Pal. conip., vol. v, p. 36, pi. i, fig. 14. 

 1903. Murex erinaceus, Lamplugli, Mem. Geol. Surv., Isle of Man, p. 475. 



SjDecifc Characters. — Shell conical, thick, rugged ; whorls 8 — 1 0, convex, 

 angulated, with a flattened shelf below the suture, the last three-fourths the total 

 length ; ornamented by strong longitudinal ribs, irregularly varicose, and by spiral 

 ridges of unequal size which cross the ribs ; spire short, turreted, rapidly diminishing 

 in size ; suture wide and deep ; mouth irregularly oval, inequilateral ; canal open 

 in the young state, closed and tubular in the adult ; outer lip thickened outside, 

 fluted and toothed inside ; pillar nearly straight. 



Dimensions. — (Of Manx specimens) L. 24 mm. B. 15 mm. 



Distrilmtion. — Ileceut : coasts of Clreat Britain and Ireland ; Atlantic from 

 Scandinavia to Madeira and the Azores ; Mediterranean, Adriatic, Algiers, Tunis, 

 Sicily. 



Fossil : Waltonian Crag : Harwich. Butleyan : Butley. Icenian : 

 Bramerton. Isle of Man, Kelsey Hill, Selsey, March and other British Pleistocene 

 deposits. Upper Pliocene and Pleistocene : Sicily. 



Bemarls. — The generic term Ocinehra has been adopted (in place of Mm-ex) hj 

 the Conchological Society of Grreat Britain for a group of shells of which 0. 

 erinacea is taken as the type. They are allied to Murex but differ from that genus 

 in the operculum and radula, and, according to M. Cossmann, in the form of the 

 mouth which is less symmetrically oval. Wood's figure of 0. erinacea was taken 

 from a Recent shell, the original Crag specimen having been lost ; those here given 

 are from the collections of the Rev. S. N. Harrison, Mr. A. Bell and the Jermyn 



