278 BRISTOL LAISTD AND FRESH- WATER MOLLUSCA. 



7. P. vortex. Linne. 



Shirehampton (T. G. P., E. C, W.), {^') streams near 

 Clevedon (J. & F. H., L. C. J.), Dardham Downs 

 (W. W. S.), (^') Weston-super-Mare. 



8. P. carinatus. Miiller. 



(*) Common throughout the district. 



9. P. complanatus. Linne. (P. marginatus. P. & H.) 



Durdham Downs (E. C. J., T, G. P.), Shirehampton 

 (E. C. W.), streams near Clevedon (J. & F. H.) 

 1874. 



10. P corneus. Linne, 



Pond near Henbury, rare (T. G. P.); streams near 

 Clevedon (J. & F. H.) 1874; Brislington 

 (W. W. S.) 



Yar. albina. Jeff. 



Streams near Clevedon (J. & F. H.) 1874. 



11. P. contortus. Linne. 



Durdham Downs (E. C. J.), Ashton (E. C. W.), 

 Shirehampton and Stapleton (W. "W. S.), 

 (*) Clevedon. 



Getms 2. Physa. Lamarck. 



1. P. hypnoriim. Linne. 



(*) Shirehampton, in ditches (T. G. P.) 1864; Ashton 

 (E. C. ^Y.), near Horfield (J. & F. H.) 1874. 



2. P. fontinalis. Linne. 



(•^*) Stapleton (T. G. P.) 1864, {^') Shirehampton and 

 Ashton (E. C. W.), Clevedon (Ti G. P.), pond near 

 Horfield (J. & F. H.) 1874, 



Genus 3. Limncea. Bruguier^. 



1. L. glatinosa. Miiller. 



At Stapleton (W. W. S.) 



2. L. involuta. Thompson. 



Stapleton (W. W. S.) 



