26 



THE NATURALIST. 



LIST OF THE LIMN^ID^ OF BIKMINGHAM. 



By W. JN'elson. 



The neighbourhood of Birmingham is a very favourable locality for this 

 interesting family, having a number of large pools, shallow streams, and 

 stagnant ditches in the immediate vicinity. 



The nomenclature is from Jeffrey's British Conchology. 

 Planorhis nitidus, occurs in Ponds at Hall Green and Stechford, at the latter 



locahty the mature specimens are much eroded. 

 P. oiautile'us, common in ponds at Hall Green. 

 P. nautileus, var. cristata, occurs with the typical form. * 

 P. alhus, common in nearly every pond, a curious distortion from a pond at 



Stechford. 



P. spirorhis, not common, in ponds at Alum Eock, Elmdon and Yardley. 

 P. vortex, common everywhere ; a specimen with three of the last whorls 



separated, assuming the form of a small corkscrew, from boggy land near 



Acock Green. 



P. carinatus, a few specimens from Hebble mill pool, and pond at Spark- 

 brook. 



P. complanatus, common throughout the district ; very fine specimens from 



pools in Sutton Park. 

 P. corneus, has only very recently disappeared from the locality. 

 P. contortus, in a stream at Knowle and a ditch at Treeford but rather small. 

 Pliysa liypnorum, in many of the ditches in the neighbourhood. 

 P. foniinalis, found sparingly in several localities. 

 lAmnoea feregra, common. 

 L. peregra. var. ovata, equally common. 



L. peregra. var. decoUata, rather common in ponds at Sparkbrook and 

 Solihull. 



L. ^9ere^?"a, var. scalariformis, one specimen from a stream in Sutton Park. 

 L, auricidaria, in several localities, but remarkably fine from Pebble Mill 

 pool. 



L. stagnalis, very common, varying greatty in size and shape, specimens from 



Handsworth and Smallheath, being much eroded. 

 L, palustris, not uncommon at Witton and Yardley. 

 L. palustris, var. corvus, a few from a muddy ditch at Treeford. 



