26 
BITHINIAD^. 
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. 120.) 
Helix tentaculata. Linn. Fauna Suec. 531. (List. Ang. t. 2. f. 
19.); Gmel. 3662.; Mont. 389. — Bulimus tentaculatus. 
Poiret., 61. — Lymnea tentaculata. Flem. Ed. Ency. vii. 78. — 
Herita jaculata. Midler., Verm. ii. 185. — Bithinia jaculator. 
Leach., Syn. Moll. 209.; Risso, Eur. M. iv. 100. — Bithinia 
tentaculata. Gray., Man. 93. t. 10. f. 120. ; Forbes and 
Hanley., B. M. iii. 14. t. 71. f. 5. 6. t. H. H. 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 Imvis (?). Walker., f. 33. — Herita sphgerica. 
Muller. 
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 Avide, 
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, Ventricose 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. Bep. ] 821, p. 239. ; Man. 94. — 
Turbo Leachii. Sheppard., Linn. Titans, xiv. 152. 1822. — 
