SUCCINEA. 137 



S. oulonga, Draparnaud. 



Acutely ovate, with ventricose whorls, prominent spine and 

 obovate scarcely oblique aperture. 



Plate CXXXI. fig. 6, 7. 



Succinea ohlonga, Drap. Tableau Moll. p. 56; Hist. Moll. p. 59, pi. 3, f. 24, 25. 



— Jeffreys, Trans. Linn. Soc. vol. xvi. p. 325, 505. — 



Alder, Mag. Zool. and Bot. vol. ii. p. 106. — Lam. Anim. s. 



Vert. (ed. Desh.) vol. viii. p. 317. — C. Pfeif. Deutsch. 



Land und Siissw. Moll. pt. 1, p. 68, pi. 3, f. 39; pt. 3, p. 56. 



— Desh. Encycl. Meth. Vers, vol. ii. p. 20. — RossmAssl. 



Iconog. Land und Siissw. Moll. pt. 1, p. 92, f. 47. — 



Charpent. N. Denks. Schweiz. Ges. Nat. vol. i. p. 3. — 



L. Pfeif. Monog. Helic. vol. ii. p. 516. 

 Helix elongata, Ferus. Prodr. Moll. 10; Hist. Moll. pi. 1 1, f. 1, 2 (Cochlohydra). 

 Ampliibina ohlonga, Hartm. in Neue Alpina, vol. i. p. 248. 

 AmpMbvlina „ Hartm. in Sturm. Deutschl. Fauna, sect. vi. pt. 8, pi. 8, 9. 

 Succinea arenaria, Bouchard-Chantereaux, Mem. Soc. dAg. de Boulogne, 



2nd ser. vol. i. p. 190. — Potiez and Michaud, Galerie 

 Douai, Moll. vol. i. p. 67, pi. 11, f. 3, 4. 



Shell acutely ovate, scarcely if at all oblique, thin but 

 not peculiarly so, not much shining externally, pellucid, 

 with inconspicuous crowded striulse, but without distinct 

 foldlike wrinkles, of a reddish horn or rufous amber colour, 

 sometimes pale and whitish. Whorls three and a half to 

 four, particularly tumid, abruptly rising from the pro- 

 foundly impressed sutures; antepenult whorl, when viewed 

 from the lower side of the shell, equal to either half or 

 more than half the succeeding one : spire rather elongated 

 for the genus. Epidermis often thick. Aperture sub- 

 ovate or oboval, not oblique, not acuminated above, 

 hardly occupying more than half the entire length of 

 the shell, rounded and not produced, nor attenuated at 

 the base : outer lip arcuated, inner lip moderately sub- 

 arcnated. 



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