GASTEROPODOUS MOLLUSCA OF BERWICKSHIRE. 275 



1. S. fjflobosus, 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 lino. 

 Phasianella stylifera, Ttirton in Zool. Journ. ii. 367, tab. 13, fig. 11. 



ITab. Barwick Bay, attached to the spines of Echinus escnlentas, very rare. 

 19. Velutina. Fleming. 



Shell subglobose, 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. — Zoophagons ? 



1. V. Icevigata, shell ampuUaceous, horn-coloured, roughish, spii-ally 

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

 the apertui'e roundish ; spire depressed, of three minute whorls. 

 Langth -^oths ; diam. nearly -tVths. V. vulgaris, Fleming in 

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

 326. Gould's Eepoit, p. 2il, tig. 159. Helix laevigata, Dillw. 

 Eec. Sh. 971. 



Hah. Deep water, not uncommon. 



The shell is cohered with a rough epidermis, and the stri^ constitute properly 

 fine ridp;es which ai'e crossed by others less distinct ; but when the epider- 

 mis 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; 

 eyes on an enlarged space at the external base of the tentacula ; foot oblong, 

 short, with plain margins : cloak plain, eutii'e ; 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 de- 

 pressed with the tentacula produced from the outer and anterior angles ; 

 tentacula two, conical ; the eyes sessile at their external bases ; penis 

 extrusile from the left side behind the tentaculum ; foot triangulate, 

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



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

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

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

 Anim. 360. 



Hob. 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. 



