44 BRITISH MOLLUSKS. 



luted form of the species represented in our figure as the type. The 

 species was commonly known in collections by Eossmassler's name 

 of Pfeifferi, until M. Bourguignat identified it with the original 

 type of Bisso's S. elegans. 



3. Succinea oblonga. Oblong Succinea. 



Shell ; oblong -turbinated, thin, transparent, 



yellowish, spire exserted, whorls rounded, 



impressed at the sutures, longitudinally 



striated, aperture moderate in size, colu- 

 mella thinly reflected. 

 Helix elongata, Studer (1789), Faun. Helv. in Coxe , s 



Travels in Switzerland, vol. iii. p. 432 (without 



characters) . 

 Succinea ohlonga, Drapamaud (1801), Tabl. Moll. p. 56. 

 Amphibulina ohlonga, Lamarck (1806), Ann. du Mus. vol. vi. p. 306. 

 Tapada ohlonga, Studer (1820), Kurz. Verzeichn. p. 86. 

 Amphihina ohlonga, Hartmann (1821), Neue Alpina, vol. i. p. 248. 

 Helix (CocMohydra) elongata, Ferassac (1822), Tabl. Moll. p. 26. pi. ix. 



f. 1, 2. 

 Succinea arenaria, Bouchard-Chantereaux (1838), Moll. Pas-de- Calais, p. 



54. 

 Succinea abhreviata, Morelet (1845), Moll, du Port. p. 54. pi. V. f. 4. 

 Hah. Throughout Europe. Eare and local in Britain. (Near the sea.) 



A much smaller species than either of the preceding. The whorls 

 are rounder, and they are impressed, not obliquely constricted, at the 

 sutures ; and, increasing more gradually, are less inflated towards the 

 aperture. The mantle of the animal, according to M. Moquin- 

 Tandon, is dotted with dark grey ; and the lower tentacles, as is 

 commonly the case with snails affecting watery habitats, are short, 

 reduced almost to tubercles. There is strong reason for believing 

 that S. arenaria of Bouchard-Chantereaux is merely a variety of 

 rather soHcl growth. It is the habit of the species generally to 

 dwell in sandy places, near the sea, burying itself during the winter 

 in an envelope of mucus. 



The only localities recorded for this species as British are North 

 Devon, South Wales, South of Ireland, and vicinity of Glasgow, 

 Scotland. 



