

LIMNJEUS. 211 



In marshes and ditches, on the mud. 



Animal greyish or dusky. 



Shell half an inch long, pale brown or greyish, 

 and is readily distinguished from the last by the 

 rounded and deeply divided volutions ; aperture 

 nearly half as long as the shell, the outer lip a little 

 reflected, but not spread nor glossy. 



95. 6. LIMNJEUS glaber. Eight-whorled Mud Shell. 

 Shell elongated, oblong-cylindrical, tapering, 

 brittle, pellucid, yellowish white, with seven 

 or eight convex volutions, and the aperture 

 elongate-ovate, (t. 9. f. 106.) 



Helix octona. Penn. B. Z. ii. t. 86. f. 135. Helix octan- 

 fracta. Mont. p. 396. 588. t. 11. f. 8. Limneus elongatus. 

 Drop. p. 52. t. 3. f. 3, 4. (bad); Alder, 1. c. 115.; Turton, 

 Man. ed. 1. 122. f. 106. Limnea elongata. Sowerby, Gen. 

 f. 6. Limnseus elongatus. Rossm. Icon. i. 101. t. 2. f. 58. 

 Stagnicola octanfracta. Leach, Syn. Moll. 102. Helix 

 peregrina. Dillwyn, p. 954. Buccinum glabrum. Muller, 

 Verm. ii. 135. (?) Lymnea elongata. Flem. E. Ency. vii. 

 78. Limnea octona. Flem. B. A. 274. Limneus glaber. 

 Gray. Man. 243. t. 9. f. 106,; Forbes and Hanley, B. M. iv. 

 178. t. 124. f. 1. Lymnea elongata. Nilson, Moll. 7. 

 Limneus subulatus. Kickx, Syn. 60. f. 13, 14. Limnaea 

 variabilis. Mitt. Moll. Main. 51. Omphiscola glabra. Beck, 

 Ind. 310. Leptolymnea elongata. Swains. Moll. 338. 

 Limnaea glabra. Moq. Tand. M. F. ii. 478. t. 34. f. 36, 37. 

 Monstrosity, the outer lip with a thick white internal rib : 

 Lyrnnasa leucostoma. Lamarck, vi. ii. p. 162. Bulimus 

 leucostoma. Poiret, Prod. 37. 

 Var. 1., spire elongate, twisted. 

 Var. 2., apex of spire truncated or decollated. 



In stagnant waters. 



Animal blackish or dusky. 



Shell an inch long, regularly tapering, with the 

 ultimate volution not larger in proportion than the 

 rest ; spire composed of seven or eight tumid volu- 

 p 2 



