26 BITHINIAD.E. 



3. 1. BITHINIA tentaculata. Tentacled Bithinia. 



Shell oval -oblong, yellowish horn -colour, 

 smooth, semitransparent, with five rather flat 

 volutions, and without umbilicus, (t. 10. f. ]20.) 



Helix tentaculata. Linn. Fauna Suec. 531. {List. Aug. t. 2. f. 

 19.); Gmel 3662.; Mont. 389. Bulimus tentaculatus. 

 Poiret, 61. Lymnea tentaculata. Flem. Ed. Ency. vii. 78. 

 Nerita jaculata. Mutter, Verm. ii. 185. Bithinia jaculator. 

 Leach, Syn. Moll. 209.; Risso, Eur. M. iv. 100. Bithinia 

 tentaculata. Gray, Man. 93. t. 10. f. 1'20. ; Forbes and 

 Hanley, B.M. iii. 14. t. 71. f. 5. 6. t. H. II. f. 3. Turbo 

 Janitor. Vail. Exer. H.N. 6. Turbo nucleus. Da Costa, 

 t. 5. f. 12. Paludina tentaculata. Flem. B. A. 315. 

 Paludina impura, Lam. vi. 175. (List. Conch, t. 132. f. 32.) ; 

 Brard, 183. t. 7. f. 2.; Turton, Man. 134 f. 120. Cyclo- 

 stoma impurum. Drap. 36. t. 1. f. 19. ; Sturm, Fauna, t. vi. 

 3.1. 



Young. Turbo laevis (?). Walker, f. 33. Nerita sphaerica. 

 MiUler. 



Var. 1. Shorter, less, and more conical. Drap. 1. 1. f. 20. 



In ditches and canals ; common all over Britain. 



Animal blackish, with golden dots ; foot two- 

 lobed in front, narrow and subacute behind; ten- 

 tacle setaceous, long ; the eyes black. 



Shell half an inch long, and three-tenths wide, 

 often covered with a blackish foul coat ; spire com- 

 posed of five volutions, the first very tumid, the 

 others hardly raised ; pillar without umbilicus. 



4. 2. BITHINIA ventricosa. Yentricose Bithinia. 



Shell conic, yellowish horn-colour, smooth, 

 semi-transparent, with five very tumid volu- 

 tions, and a small oblique umbilicus, (t. 10. f. 

 121.) 



Bithinia ventricosa. Gray, M. Rep. 1 821, p. 239. ; Man. 94. 

 Turbo Leachii. Sheppard, Linn. Trans, xiv. 152. 1822. 



