64 LIMN^ID^. 



Var. 3. labiata. — Shell dwarfed and more solid, with the outer 

 lip much reflected and thickened. Lough Neagh, Ireland 

 (Moggridge), B.C. Near Birmingham (G. Sherriff Tye), J.C. 



Monst. sijiistrorsa. — Spire reversed. Kenn Moor, Somerset 

 (Norman), B.C. 



C. Shell elongated ; spire considerably produced. 

 6. L. palus'tris,* Muller. Pl. V. 



Body rather opaque, of a dark slaty-grey or deep violet-colour 

 above, greenish-grey beneath, closely mottled with indistinct 

 blackish and yellowish spots ; tentacles conical, slightly curved, 

 somewhat pointed at the tips, of a brownish colour which is 

 paler at the extremities ; eyes oval, black, seated on small 

 round tubercles ; foot oblong, slightly notched, and truncate 

 in front, rounded and faintly keeled behind. 



Shell oblong-conic, thick, opaque, of a dull brownish horn- 

 colour, with occasionally a violet tinge ; with strong irregular 

 stride in the hne of growth, the spaces between them filled in 

 with rows of close-set finer lines, rather strongly ridged spirally, 

 especially on the last two volutions ; epidermis thin ; whorls 

 6-7, rather convex, but angulated by the ridges, body whorl 

 occupying about two-thirds of the length of the shell ; spire 

 considerably produced, and ending in an acute apex ; suture 

 deepish, usually encircled by a slender white line ; mouth nearly 

 oval ; oiiter lip thickish, very little reflected ; inner lip spread 

 on the base of the penultimate whorl ; fold strong and sharp. 



Inhabits marshy places, slow streams, and stagnant 

 water throughout Great Britain. It is a sluggish and 

 irritable creature, and very voracious ; it frequently 

 leaves the water. The eggs vary from fifty to ninety 

 in number, and are deposited in capsules which in 

 form resemble a depressed or flattened cylinder. 



Var. T. Corvus. — Shell larger, more tumid, purplish-brown. 

 Suftolk (Barlee), B.C. Near Birmingham (G. Sherriff Tye), 



* Living in marshes. 



