CUNDALL : ON THE MOLLUSCA OF BRISTOL. 265 



Pupa secale var. alba. St. Vincents Rocks. 



P. umbilicata. General. 



P. U7nbilicata var. alba. Somersetshire (Norman). 



P. umbilicata var. edentula. Cotswold Hills. 



P. marginata. Leigh Woods; Sea Mills; Redland. 



P. fuarginata var. bigranuta. Bath (Clark). 



P. jnarginata var. albina. Somersetshire (Clark). 



Sphaerium rivicola. Kennet and Avon Canal; Stroud Canal; 



Stapletofi; Keynsham. 

 S. cornea. Stapleton; Kenn Moor; Stoke-Gifford, &c. 

 S. cornea var. flavescens. Clevedon ; Stapleto?i. 

 S. cornea var. nucleus. Clevedon ; Stapleton. 

 S. cornea var. scaldiana. Stapleton (Rich). 

 6". cor nea var. pisidioides. River Avon. 

 S. ovale. Kennet and Avon Canal. 



S. lacustris. Blaise Castle; Avonmouth; Ham Green; Clifton. 

 Succinea putris. Stapleton; Stoke Gifford; Avonmouth; 



Coombe Dingle, &c. 

 S. elegans. Stoke Gifford; Avonmouth; Westbury; Clevedon; 



Burnham. 

 S. oblonga. Burnham (? ). 

 Testacella Maugei. Redland. 

 T. haliotidea. Redland. 

 Unio pictorum. Kennet and Avon Canal; River Avon; 



Stapleton. 

 U. pictorum var. radiata. River Avon. 

 U. tumid us. Kennet and Avon Canal; Stapleton. 

 U. tumidus var. radiata. Kennet & Avon Canal; Stapleton. 

 U. tumidus var. ova lis. River Avon ; Bath. 

 Vitrina peliucida. Blaise Castle; The Downs. 

 Valvata piscinalis. Kennet and Avon Canal; Kenn Moor; 



Nailsea; Keynsham. 



