114 LIMN.EID^. 



line, which is caused by the appearance through the shell of 

 the upper edge of the preceding whorl : mouth obliquely oval, 

 but contracted on the inner or columellar side : outer lip rather 

 thick, scarcely reflected, but expanded below : inner lip spread 

 on the columella : fold extremely prominent and sharp. L. 1. 

 B. 0-4. 



Yar. 1. Corvus. Shell much larger and more swollen, of a 

 purplish -brown colour. L. 1-35. B. 0-65. HeliM Corvus, 

 Gmel. Syst. Nat. p. 3665. 



Var. 2. elongata. Spire elongated. 



Var. 3. tincta. Shell shorter and broader, Hght brown 

 with a purplish mouth. Limneus tinctus, JefFr. in Linn. Tr. 

 xvi. p. 378. 



Yar. 4. conica. Shell conic, greyish -white, with a deep 

 suture and an umbihcal cleft. L. Q-o. B. 0*25. 



Yar. 5. rosea -lahia'ta. Mouth of the shell furnished inside 

 with a rose-coloured or white rib. 



Yar. 6. decoUata. Spire truncate. 



Habitat : Marshes, ditches, and shallow pools every- 

 where from Aberdeenshire to the Channel Isles. Var. 1. 

 Suffolk (Barlee). Var. 3. Falmouth (J. G. J.). Var. 3. 

 Swansea and Dorsetshire (J. G. J.) ; Anglesea (Gibbs). 

 This last variety resembles a Bulimus in form. Var. 4. 

 Banks of the Thames from Hammersmith to Woolwich 

 (J. G. J.) ; Cork (Humphreys) . This is a peculiar variety; 

 but as it is connected with the typical form by the variety 

 tincta, and it is not found in company with any other 

 form, I do not consider it to be specifically distinct. Some 

 specimens have a longer spire and resemble L. truncatula. 

 Var. 5. Belfast (Thompson); Cork (Humphreys). Var.6. 

 Preston (Gilbertson) ; Guernsey (Lukis) ; Ballinahinch, 

 Co. Gal way (J. G. J.). This species is also one of our 

 upper tertiary fossils. Abroad it ranges from Siberia to 

 Algeria and Sicily. 



It has the character of being a slow, irritable, and very 



