138 littorinid.t;. 



R. VENTKOSA, Montagu. 



Elongated, smooth, lustrous, transparent, of an uniform oliva- 

 ceous tint, never pure white (when recent) : whorls ventricose, not 

 shouldered, nor abruptly enlarging : outer lip not patulous. 



- Plate LXXXVII. fig. 1, 5, (>, 7. 



ScHROTER, Fliissconch. pi. 8, f. 7 r" 

 Turbo ventrosus, Mont. Test. Brit. vol. ii. p. 317, pi. 12, f. 13. — Maton mid 

 Rack. Trans. Linn, Soc. vol. viii. p. 164. — Rack. Dorset 

 Catalog, p. 49, pi. 18, f. 12, a. 

 Cydostonm acultim, Draparn. Moll. France, p. 40, pi. 1, f. 23 (probably), from 

 which Paludina acuta, Micii. Comp. a Drap. p. 100 ; 

 PoTiEZ and JMiCH. Gal. Douai, Moll. vol. i. p. 244 ; Desh. 

 Anim. s. Vert. vol. viii. p. 521 ; Gras, Moll. Isero, App. 

 p. 20. 

 Tin-liO ventricosiis, DiLLVV. Recent Shells, vol. ii. p. 840. — Wood, Index Testae. 



pi. 31, f. 59. 

 Pahulina octona, NiLSSON, Moll. Suecire, p. 92 ? 

 Cimjula veniricosa, Fleming, Brit. Animals, p. 307. — Brit. Marine Conch. 



p. 180. 

 Paludina stagno7-um, TvRT. Manual Land and F. W. Sliells, p. 136, f. 123. — 

 Gray, Manual L.and F. W. Shells, p. 95. 

 „ murialica, Desh. Encyclop. Meth. Vers. vol. iii. p. 693 (probably). 

 Cingula minuta, Gould, Invert. Massach. p. 265, f. 171 ? 



Rissoa ventricosa, Macg. Moll. Aberd. p. 148. — Brown, Illust. Conch. G. B. 

 p. 12, pi. 8, f. 27. 



Our reference to continental synonyms for this species 

 is purposely limited. The P. muriatica of Lamarck, and 

 the Turho thermalis and Helix octona of Linnaeus are often 

 regarded as the original names of the few foreign shells 

 above cited. They are too obscurely defined to insure 

 identification. 



This shell is thin, smooth, shining, and of a pellucid 

 horn-colour, which has usually a tinge of olivaceous green 

 or fulvous yellow. The .shape ranges from oblong-conic to 

 oblong-turreted, and is composed of six (more rarely five) 

 much rounded volutions, that are divided by a simple but 



