GASTER0P0D0U3 MOLLUSCA OF BERWICKSHIRE. 267 



10. TuiuiiTELLA. Lamarck. 



Shell tui-reted, tapered, with numerous whorls, the last not much 

 larger than the penultimate; aperture round, the margin disjoined on 

 the body-whorl, thin ; operculum circular, horny. — ZoopluKjous. 



1. T. terehra, shell white or pale brown, spirally ridged with fine 

 decussated striee in the interstices ; whorls from twelve to sixteen, 

 rounded, tapered to a point ; aperture round, the outer lip very 

 thin. Length \^ inch ; breadth tVths. Flem. Br. Anim. 302. 

 Turbo terebra, Linn. — Penn. Brit. Zool. iv. 308, tab. 84, fig. 4. 



Hah. Berwick Bay, in deep water. 



11. LiTTORINA. FeRUSSAC. 



Shell oval, rarely subglobular, thick, the body -whorl occupying at 

 least one-half of the length, non-umbilicate ; aperture roundish, the 

 margin sharp-edged, disjoined on the body ; pillar flattened ; opercu- 

 lum horn}', with few volutions increasing rapidly in width, its nucleus 

 lateral. 



1 . L. litforea, shell ovate-acute, thick, spirally striated, greyish with 

 numerous brown spiral lines ; whorls six, nearly even, the superior 

 small and ill defined ; pillar white, the throat brown. Length 

 l-i^j-ths ; breadth -iVths. Turbo littoreus, Lin. — Lillw. E,ec. Sh. 

 817. /'/m. Br. Anim. 298. 



Hdb. Berwick Bay, very common between tide mai'ks. 



In oar bay L. littorea is subject to very little variety, but it occasionally occnrs 

 of uniform hyacinth-red colour. The outer lip before maturity is thin, and 

 marked with dark scores, but it ultimately grows thicker and white. The 

 operculum is horny, ovate, pointed above, darker coloured and spirally 

 twisted near the centre, the margin thin membranous. 



The animal is beautifully marked with black spots and lines disposed trans- 

 versely, and forming a sort of network on the sides. Mouth shortly 

 proboscidiform, furnished with a pair of triangular thick subcorneous jaws 

 and a narrow ribbon-like tongue rolled up sj^irally, and when extended 

 upwards of an inch long : it is marked across with numerous denticulated 

 striae, and has a broad membrane at the base. Tentacula two, dorsal, 

 tapered, somewhat compressed, contractile, spotted : eyes small, inserted 

 into an indenture near their dilated bases : cloak with a plain continuous 

 pale-yellow margin : branchiae in a single long pectinate process adnate to 

 the left side : rectum on the opposite side, large, with a prominent narrow 

 orifice. Sexes separate ; the penis of the male orginating under the right 

 tentaculum, large, tapering from a broad base to a point, a little com- 

 pressed, retroflectod. Foot white, oval, short, with plain margins. I have 

 seen a specimen in which the tentacula were divided into two branches. 



The snail, when washed and boiled, is eaten by children, and sometimes by the 

 CDmmon people. Of late years great numliers have been exported from our 

 coasts to the London market, where they find a ready sale : — 



" The periwinkle, prawn, the cockle and the shrimp. 



For wanton women's taste or for weak stomachs bought !" 



Drayton. 



