140 LITTORINIDiE. 



The smaller variety (pi. LXXX VII. f. 7), usually termed 

 muriatica* by collectors, is shorter, is composed in genei-al 

 of only five whorls and a half, is more intense in colouring, 

 and has its volutions somewhat shouldered, their swell 

 being much more perpendicular below, and a little hori- 

 zontally flattened above. The continuity of the peristome 

 is scarcely perfect ; and the principal swell of the outer lip, 

 which is not so broadly rounded at the base, is near the 

 middle. 



Not so common as uhre and apparently of more ma- 

 rine habits, though found in not a few brackish water 

 localities. 



Laugharne (Lyons) ; near Swansea (Jeffreys) ; Oul- 

 lercoats from sand and sea- weeds, very rare (Alder). 



It is found in many localities in the west of Europe. 



We have figured Mr. Bean's unique example of his B. 

 pellucida (Brit. Marine Conch, p. xliii. f. 89) and must 

 record the liberal spirit which induced him, in his love of 



drawing agrees fairly enough with ventrosa; the shape, however, in the minute 

 natural-sized delineations, is represented as decidedly more c_ylindrical. In the 

 absence of the original example (perhaps after all an exotic shell), we can merely 

 copy, like our predecessors, the characters mentioned in the " Testacea Britan- 

 nica." 



7'urbo disjunctiis, Mont. Test. Brit. Suppl. p. 128. — Laskey, Mem. Werner. 



See. vol. i. pi. 8, f. ,3.— TuRT. Conch. Diction, p. 219. 

 €in(jula disjimcta, Fleming, Brit. Anim. p. 307. — Brit. Marine Conch, p. 178. 

 Rissoa „ Brown, Illust. Conch. G. B. p. 12, pi. 9, f. 7. 



Rather slender, white, perfectly smooth, with six remarkalily rounded volu- 

 •[ions divided by a broad deep suture, the bottom of which is flat or concave, not 

 angular as in most other shells, giving the whorls somewhat the appearance of 

 being disunited, aperture nearly orbicular; pillar-lip reflected, behind it an umbi- 

 licus. Length scarcely a quarter of an inch. 



* Not that of Macgillivr.iy, Moll. Abcrd. p. 148, copied as Cingida (Litiorinu) 

 muriatka, Brit. Marine Conch, p. 2G], xxxix. which Mr. Jeffreys informs us, 

 after examining the types, was constituted from a worn specimen of what Mr. 

 Alder once proposed to call Icuuiscidpta (regarded by us as a smnoth aberrant 

 form of purr a). 



