114 LIMNJEIDJE. 



above by a narrow white line, which is caused by the appear- 

 ance 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. 



Var. 1. Corvus. Shell much larger and more swollen, of 

 a purplish-brown colour. L. 1-35. B. S 0*65. Helix Corvus, 

 Gmel. Syst. Nat. p. 3665. 



Yar. 2. elongata. Spire elongated. 



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

 with a purplish mouth. Limneus tinctus, Jeffr. in Linn. 

 Tr. xvi. p. 378. 



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

 suture and an umbilical cleft. L. 0-5. B. 0'25. 



Var. 5. roseo-labiata. Mouth of the shell furnished inside 

 with a rose coloured or white rib. 



Var. 6. decollata. Spire truncate. 



HABITAT : Marshes, ditches, and shallow pools every- 

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

 Suffolk (Barlee). Var. 2. 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. Galway (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 



