] 28 CYCLADIDiE. 



Gill in Sligo, Portarlington and Finnoe, in Tipperary, 

 likewise furnish it (Thompson, Ann. N. H. 6, p. 195) ; 

 Mr. Jeffreys has examples from Cork, collected hy Mr. 

 S. Wright, jun. 



In Scotland it has heen taken from a millpond near 

 the new bridge of Don in Aberdeenshire (Macgillivray), 

 where, however, it is of rare occurrence. Mr. Barlee has 

 taken it at Bracadale and Portree, in Skye, and at other 

 localities in the west. 



P. pulchellum, Jeiiyns. 



Small, striated (not grooved) ; umbones simple, and without 

 appendage. 



Plate XXXVII. fig. 12 and 13. 



y Pisidium fontinale, Pfeiffer, Deutsch. Land und Sussw. Moll. pt. 1, p. 12.), 



pi. 5, f. 15, 16. 

 Cyclas Jhntimdis, Brown, Edinburgh Journ. of Nat. and Geograph. Science, vol. 



i. p. 11, pi. l,f. 6,7. 

 Pisidium pulckeUum, Jenyns, Trans. Cambridge Phil. Soc. vol. iv. p. 306, pi. 



21, f. 1, 2, 3,4, 5. — Gray, Manual L. and F. W. 



Shells, p. 284, pi. 12, f. 151.— Macuilliv. Moll. Aber- 



deens. p. 252. 

 Cyclas pulchella, Hanl. Recent Shells, vol. i. p. 91. 

 Pisidium fontinale, Brown, 111. Conch. G. B. p. 94, pi. 39, f. 23. 

 Pisidium Jenynsii, Macgixliv. Moll. Aberdeens. p. 249. 

 „ Johannis, „ „ p. 248. 



It would be a bold assertion were we to declare that form 

 is no characteristic in the Pisidia ; yet this species might 

 well bear us out in the hypothesis, such a multiplicity 

 of contour does its aspect present ; with the most opposite 

 forms, however, so gradually merging into each other that 

 it is absolutely impossible to determine where each variety 

 commences. Although no two forms seem more remote 

 than typical specimens of the varieties a and }>, the for- 



