214 PEOCEEDINGS OF THE MALACOLOGICAL SOCIETY. 



Tipperary, South. — ST. 



R. Suir, Clonmell [R. A. P.]. 

 Waterford.— WA. 



R. Suir, Clonmell [R. A. P.]. 



„ Fiddown [R. A. P.] [C. 0.] [K. & W.]. 

 Wexford.— WX. 



R. Barrow, New Ross [R. A. P.] [C. 0.] [K. & W.]. 



PLEISTOCENE. 



England. 



Cambridgeshire. — CB. 



Barnwell [K. & W.]. 

 Essex, North.— NE. 



Clacton [K. & W.]. 

 Essex, South. — SE. 



Grays [C. 0.] [K. & W.]. 

 Kent, West.— WK. 



Crayford-Erith [C. 0.] [K. & W.]. 



CROMERIAN. 



England. 



Kent, West.— WK. 



Swanscombe [K. & W.]. 

 Norfolk. East.— EN. 

 Mundesley [K. & W.]. 

 Sidestrand [K. & W.]. 



The initials in [ ] are those of the several collectors who hold 

 specimens, viz. : C. Oldham, J. E. Cooper, Kennard & Woodward, 

 and R. A. Phillips. 



PisiDiUM HiBEENicuM, Westerlund. 



This proves to be a far more polymorphic species and far more 

 widely distributed than was at first thought, as shown by 

 Mr. Phillips and Mr. Stelfox in their important paper on it and its 

 range.^^ 



In the early days of one's study of the British Pisidia, whilst taking 

 the fornis from Lough Nagarriva, the type locality, as the standard, 

 although recognizing they were probably abnormally inflated, one 

 was unprepared for so wide a distribution and hence cautious about 

 attributing to this species forms that might well be only varieties 

 of other, better-known species. Decisions were then come to by 

 me, which the authors of the above-named paper quote as final, 

 that might have been modified had opportunity been courteously 

 afforded for defence or recantation. In some instances it is even 

 possible that the gatherings which were submitted to me from 

 a given locality may not have contained representatives of the species 

 at all, or only a few readily overlooked in the number, 



'5 Irish Naturalist, xxvii, 1918, pp. 33-50, 2 pis. 



