BUTTERELL: land and freshwater shells of HORNSEA. 137 



Pisidium roseum. Hornsea Mere. 



Sphasrium corneum. Ditch near Hornsea Bridge, Hornsea 



Mere. 

 Anodonta cygnea. Hornsea Mere, abundant. 

 A. anatina. With the last, both species very variable in size. 

 Planorbis complanatus. In ponds, fine, Hornsea Mere. 

 P. carinatus. Hornsea Mere. 

 P. vortex. Hornsea Mere. 



P. spirorbis. Ditch in a field near Wassand, plentifiil. 

 Limnsea peregra. Generally distributed but not very abundant. 

 L. truncatula. Ditch near Hornsea Mere. 

 L. palustris. In ditches and swampy places near the Mere. 

 Physa fontinalis. Ditch near Wassand. 

 Bithynia tentaculata. Ditch near Hornsea Bridge. 



Note on Planorbis corneus. — I have recently taken a 

 number of specimens of Planorbis corneiis (from Spring Dyke, 

 near Hull), with the animal of a bright pink or crimson tinge, 

 similar I imagine to those found by Mr. Nelson some time 

 ago, the shell also had a reddish tinge.- — J. D. Butterell. 



o 



Note on the Shells in the neighbourhood of Bris- 

 tol. — I do not know whether you will consider the following 

 localities, that as far as I can ascertain do not appear to have 

 been before recorded, worth noting in the Journal of Conchology, 

 the shells were taken last year. Limncea stagjialis var. fragilis, 

 River Froom, Stapleton, Bristol. Pisidium pusilhivi var. obtusalis, 

 Avonmouth, Bristol. Conovulus denticulatus var. 7nyosotis, River 

 bank near Pell, Bristol. — J as. W. Cundall. 



