62 LIMN^IDjE. 



its shell In a horizontal position. It breeds during 

 the months of July and August ; the capsules are of 

 a tubular form, somewhat compressed, and more or 

 less curved or bent like a bow. Each of them contains 

 from fifty to sixty eggs, and the fry are excluded in 

 about fifteen days. 



Van I. acuta. — Body of a greyish colour and closely covered 

 with black spots. Shell smaller than the typical form, more 

 oblong, and having the last whorl and mouth proportionably 

 narrower. Marshes on the sea -coast of Glamorganshire, 

 Church Stretton, Salop, Kent, Co. Tyrone (J. G. J.), Yoxford, 

 Suffolk (Barlee), B.C. 



Var. 2. albida. — Shell smaller and thinner, white, with a 

 shorter spire and less distinct strise. Bath (Clark), Blenheim 

 Lake (Mrs. Richard Smith), B.C. 



5. L. stagna'lis,* Linne. Pl. V. 



Body yellowish-grey, with a faint tinge of green, mottled with 

 minute brown and milk-white specks ; tentacles flattish, in form 

 of an elongated triangle, pointed at their tips, rather transparent, 

 greenish-grey, powdered with distinct milk-white spots ; foot 

 broad, faintly dotted with brown, margined with a narrow line 

 of yellow, convex and keeled behind; lijigual 7'ibbon with no 

 rows of III teeth= 12,210, central tooth minute, laterals large, 

 with two points, the outer one being the smaller. 



Shell ovate - oblong, moderately thick, semitransparent, 

 greyish or yellowish horn-colour, with strong irregular striae in 

 the line of growth, as well as with numerous intermediate rows 

 of slender but sharply defined curved striae which are more 

 apparent on the upper volutions, and indistinctly ridged spirally ; 

 epidermis rather thin; whot'ls 6-8, convex, but somewhat 

 angulated by the ridges, body whorl much larger, and more 

 tumid than the others; spire elongated, tapering to an acute 

 point ; suture deepish, with a narrow white line on its margin ; 

 mouth nearly oval ; outer lip rather thin, somewhat reflected in 



Living in stagnant pools. 



