172 LIMN^AD^. 



The animal, except in those features which correspond 

 with the differences of the shell, closely resembles that of 

 pereger. 



The more limited and peculiar range of this form would 

 seem to warrant our regarding it as distinct. It is chiefly 

 found in the midland and south eastern counties, and is 

 abundant in many localities around London, Clumber 

 Lake, Notts, and in company with the var. acutus (which 

 occurs in marshes on the sea coast) at Crymlyn Barrows, 

 near Swansea (Jeffreys.) Sparingly at Worcester (Reece). 

 Common about Nottingham (Lowe); fine and characteristic 

 at York (T. Hincks) ; scarce and poor near Clitheroe 

 (Winstanley) ; at Prestwich car, small, and ponds near 

 Darlington (Alder) ; pond, Abercorn park, south of Scot- 

 land (Logan). Not uncommon in Ireland (W. Thompson). 



L. burnetti, Alder. 



Anipullaceous, wrinkled ; mouth very ample j fold indistinct. 

 Spire sunken or almost level. 



Plate CXXIII. fig. 8, 9. 



Limncea Burnetti, Alder, Ann. Nat. Hist, new ser. vol. ii. p. 396, pi. 11, top 



figures. 



Shell obliquely ovate-globose, very thin, pale reddish 

 tawny, semi-transparent, a little glossed, more or less re- 

 gularly wrinkled lengthways, the spiral lines or interrup- 

 tions distant or inconspicuous. Spire scarcely, if at all, 

 elevated ; the penult volution rounded, the rest very small 

 and sunken. Almost the entire area occupied by the 

 body, which abruptly swells out from the well pronounced 

 and little slanting suture, and is broadly tumid in the 

 middle ; anterior or basal declination rounded and abrupt 



