310 PLIOCENE MOLLUSCA. 



bellopsis proposed in 1882 by MM. Bucquoy, Dautzenberg, and Dollfus for the 

 group of Columbellidge represented by C. minor, a shell in their opinion more nearly 

 approaching G. Borsoni. 1 C. Borsoni was known to Wood from Walton. I have 

 obtained several specimens at Oakley which seem to be the same. The fossil from 

 the Italian Miocene now given for comparison I owe to the kindness of my good 

 friend Prof. Sacco. 



Genus MITRA, Lamarck, 1799. 

 Mitra ebenus, Lamarck. Plate XXXIII, fig. 4. 



1811. Mitra ebenus, Lamarck, Arm. du Mus., vol. xvii, p. 216, no. 58. 



1836^4. Mitra ebenus and vars., Philippi, Enuin. Moll. Sic, vol. i, p. 229, pi. xii, figs. 8—10, 1836 ; 



vol ii, p. 195, 1844. 

 1850. Mitra ebenus, S. V. "Wood, Mon. Crag Moll., pt. ii, p. 310, pi. xxxi, fig. 7. 

 1858. Volutomitra ebenus, H. and A. Adams, Gen. Rec Moll., vol. i, p. 173. 

 1870. Mitra ebenus, A. Bell, Journ. de Conch., vol. xviii, p. 349, no. 301. 

 1875. Mitra ebenus, Seguenza, Boll. R. Com. Geol. Ital., vol. vi, p. 204, no. 114. 

 1878. Mitra ebenus, Monterosato, Enum. e Sinon. Conch. Medit., p. 48. 

 1878. Mitra ebenus, de Stefani ee Pantinelli, Bull. Soc. Malac. Ital., vol. iv, p. 111. 

 1883. Mitra ebenus and vars., Bucquoy, Dautzenberg et Dollfus, Moll. mar. Bouss., vol. i, p. 115, 



pi. xvi, figs. 1 — 7. 

 1890. Mitra ebenus, Carus, Prod. Faun. Medit., vol. ii, p. 406. 



(?) 1894. Mitra sp., Kendall, Journ. Isle of Man Nat. Hist. Soc, vol. i, pp. 219, 222, no. 78, fig. 20. 

 1901. Mitra ebenus and vars., Kobelt, Icon, schalentrag. europ. Meeresconch., vol. ii, p. 47, pi. xli, 



figs. 2—23 ; pi. xliii, figs. 1—6. 



Specific Characters. — Shell slender, solid, subfusiform ; whorls slightly convex, 

 smooth or with nearly obsolete costa? on the upper ones ; suture distinct ; mouth 

 narrow, elongate ; canal short, open ; columella with 4 folds. 



Dimensions. — L. 20 mm. B. 8 mm. 



Distribution. — Recent : Mediterranean, west Atlantic as far south as the coasts 

 of Morocco, the Canaries and the Cape Verde islands. 



Fossil : Coralline Crag : Gedgrave. Waltonian : Little Oakley. 

 Newbournian : Waldringfield. Isle of Man (?). 



Oligocene and Miocene (B. D. D.). 



Pliocene : Siena, Bologna, Biot. 



Pleistocene : Sicily, Calabria, Tuscany. 



Remarks. — Of this southern and rather variable form, known to Wood from the 

 Coralline Crag only, I have one or two imperfect specimens from Oakley, and 

 Mr. Bell has reported it from Waldringfield. It may be possibly derivative at the 

 latter localities. 



1 Moll. mar. Bouss., vol. i, p. 77. 



