5o6 



WORMS. TESTACEA. 81. Helix. 



Petiv, gcz. tab, 10. Jig. IT. /. 100,/. 2i6» a 



Chemn. conch. 9. tab, 126. /fg\ 1102.^^-1-7-27 u^ 'A • £ * 

 Inhabits Ponds and rivers of Europe and Barbarj: fmall. 

 Shell pellucid horny, rarely opake, very finely iiriate: whorls 4 

 or 5, the firft much larger than the reit. 



Complanata Shell carinate downwards, umbilicate convex, beneath flat : 



aperture femi heart-ihaped. 

 Chemn. conch. 9. tab. 127. fig. 1 1 21 — I 123. 

 Schrcet.fiufconch t. $.f. 22 — 25. 

 Schrat. Einl. in conch. 2, /. t^.fi. 1. 

 2. Martini conch. 4, tab. S.fig. 22 ? 

 Schrat.fiufconch. tab $.fig. 27 ? 

 Inhabits ponds and rivers of Europe Iff Barbary ; 1 — 6\ lines in 



diameter : the inhabitant black, with rufous ventacula. 

 Shell brown or pale, lubpellucid, very finely ftriate tranfverfely : 



whorls 5 or 6. 



Ringens. 



Shell fubcarinate imperforate convex, with an inverted ring- 

 ent aperture: lip 4-plaited behind. 



Shanv Natur MiJcelL tab. 374. the leffer figures, 



Lijier tab, 99. Argenv. conch, tab. 2%. fig. 13, 14. 



Bonan recr. 3. fig. 330, 331. Muf. Kirch, $,f. 331, 332, 



Martini Berl. Magaz. 2. t. \.f. 42. a, b. 



Favann. conch, tab. 63. fig. F. 10. 



Chemn. cench 9. t. \ oo.fi. 9 1 9, 920. 



Born Muf. Caf. Vind tejl. t. \\,f. 1 1 , 12. 

 2. Lifter tab 83, 84, 87. 



Inhabits India : 1 \ inch wide, Shell yellowilh-broWn or cine- 

 reous with ferruginous fpots, or white with brown fpots : 

 aperture oblong-oval, with 4, 5, 6 or 8 plaits or teeth: <whorls 6. 



Sinuata. 





Shell imperforate fubcarinate, reddifh-brown with a white 

 ridge : aperture tranfverfe toothed and 3 plaited 

 behind. 

 Lister tab. 97, 98* Chemn % 9, ta£. 126. fig, 1 no — 1 1 T2. 

 A7<?/» c/?r. tab. I 1 ,^g\ 3 1 d . 1 . Argenv conch, tab. 63. F. 8 ? 



2. Lister, tab. 96. Ar^en<v . conch , tab . 63. F« 4 . 



3, Lister tab. 93. Klemopr.t. l.fi. 22. 

 Inhabits America : about 9 lines in diameter. 



«S&// loughifh, flattifh each fide, with 5 roundifh wherrs: lip 

 reflected. 



Lucerna, Shell imperforate white, above fiattifh, beneath gibbous: 

 aperture tranfverfe 2-toothed. 



Inhabits Chemn. conch. 9. tab. 126. fig. 1108, 1109. 



Shell 1 3 lines broad, white not ftriate, with very deprefled whorls. 



Ldmpas, 



