GA8TEROPODOUS MOLLUSCA OF BERWICKSHIRE. 275 



1. S. globosus, shell globose, yellowish horn-colour, transparent, quite 

 smooth ; whorls five ; the two lower ones very tumid, the three 

 terminal ones abruptly minute, produced. Length 1 line. Pha- 

 sianella stylifera, Turton in Zool. Journ. ii. 367. tab. 13. fig. 11. 



Hob. Berwick Bay, attached to the spines of Echinus esculent us, very rare. 



19. VELUTINA. FLEMING. 



Shell subgloboso, covered with a distinct epidermis, the body-whorl 

 very large and the spire small, lateral ; aperture large, no pillar, the 

 margins acute, entire : no operculum. Zoophagous? 



1. V. l&vigata, shell ampullaceous, horn-coloured, roughish, spirally 

 striate, thin and subpellucid ; body-whorl very large, ventricose, 

 the aperture roundish ; spire depressed, of three minute whorls. 

 Length ^ths ; diam. nearly ^ths. V. vulgaris, Fleming in 

 Edinburgh Encyclop. xiv. 625. V. leevigata, Flem. Brit. Anim. 

 326. Gould's Report, p. 241, fig. 159. Helix hevigata, Dillw. 

 Rec. Sh. 971. 



Hab. Deep water, not uncommon. 



The shell is covered with a rough epidermis, and the striae constitute pro- 

 perly fine ridges which are crossed by others less distinct ; but when 

 the epidermis is removed by tossing on the shore, the surface becomes 

 smooth or faintly striolate, and the shell itself is then either pure white, 

 or pale rose-colour. 



The animal is white and entirely fills the shell : tentacula two, tapered, short ; 

 eves on an enlarged space at the external base of the tentacula ; foot 

 oblong, short, with plain margins : cloak plain, entire ; above the outer 

 tentaculum the male organ appears in the shape of a short thick obtuse 

 process. 



20. CORIOCELLA. BLAINVILLE. 



Animal naked, gasteropodous ; cloak shield-like, sinuated in front, 

 overlapping and concealing the body ; head quadrangular and depressed 

 with the tentacula produced from the outer and anterior angles ; tenta- 

 cula two, conical ; the eyes sessile at their external bases ; penis ex- 

 trusile from the left side behind the tentaculum ; foot triangulate, trun- 

 cate in front, the margins plain. Shell earshaped, white, patulous. 

 1. C. tcntaculata, "tentacula produced, filiform; the foot pointed 

 behind." Lamellaria tentaculata, Montagu in Lin. Trans, xi, 

 186, pi. 12, figs. 5, 6. Sigaratus tentaculatus, Flcm. Brit. 

 Anim. 360. 



Hal. In deep water among corallines, and under stones at low-water mark. 

 It is not uncommon on the shores of Holy-Island, and in autumn of 

 1840 was found in abundance in the Coves-Haven. 



The fluff t when extended, is about three quarters of an inch long, of a circu- 

 lar or oval form, the back convex; roughish or granulous, of a wood- 



B. N. C. NO. IX. U 



