60 LIMN&ID&. 



suture deep; mouth very large. Lakes, ponds, and canals, 

 attaining sometimes a considerable size, B.C. 



Var. 5. acuminata. Shell resembling the last variety in all 

 respects, except in having a more produced spire and a smaller 

 mouth. With the last, B.C. 



Var. 6. intermedia. Shell rather compressed towards the 

 front margin, and thinner than usual ; spire more produced ; 

 mouth expanded. Ponds, B.C. 



Var. 7. oblonga. Shell oblong and compressed in front. 

 Lewes, Suffolk, Church Stretton, Salop, Bearhaven, Co. Cork 

 (J. G. J.), B.C. Marsh at Hamstead, near Birmingham 

 (G. Sherriff Tye), J.C. 



Var. 8. labtosa. Shell smaller, having the outer lip remark- 

 ably expanded and reflected. Appin, Argyleshire (Bedford), 

 B.C. Sutton Park, near Birmingham (G. Sherriff Tye), J.C. 



Var. 9. picta. Shell rather smaller than the last, and beauti- 

 r ully marked by alternate bands of brown and white, which are 

 sometimes confluent. Ulva, I. Hebrides (Bedford), B.C. 



Var. 10. maritima. Shell dwarfed, rather solid ; spire pro- 

 duced ; suture deep. Marshes on the sea-coasts of Glamorgan- 

 shire and North Devon (J. G. J.), B.C. 



Var. ii. succineceformis. Shell shaped like a Succinea, and 

 very thin ; whorls 4 ; spire small and oblique. Kensal Green 

 Q. G. J.), B.C. 



Var. 12. albida. Shell of a very clear white colour. Near 

 Askern, Yorkshire (Lister Peace), J.C. 



The following monstrosities also occur : 



Monst. i. decollata. Shell more or less eroded; spire trun- 

 cate. Church Stretton, Oxwich, near Swansea (J. G. J.), B.C. 

 Several localities near Birmingham (G. Sherriff Tye), J.C. 

 Warwickshire (McMurtrie). 



Monst. 2. sinistrorsa. Shell spire reversed, rather solid, 

 spiral ridges distinct. Scarborough (Bean), pond near Balta, a 

 single specimen (Waller), B.C. 



Monst. 3. scalar if or mis. Shell oblong, with deep and regular 

 striae ; whorls more or less disjointed, suture consequently deep. 

 Warminster (J. G. J.), B.C. Sutton- Coldfield near Birming- 

 ham (G. Sherriff Tye), J.C. Warwickshire (McMurtrie). 



