August, 1911. The Irish Naturalist, 137 



NOTES OF CERTAIN TERRESTIAL 



AND FLUVIATILE MOLLUSCA 

 FROM GLENGARRIFF, CO. CORK. 



BY STAFF-SURGEON K. H. JONES, M.B., F.Z.S., R.N. 



The specimens referred to in the following notes were 

 collected by the writer in the vicinity of Glengarriff, Bantry 

 Bay, at the end of March and the beginning of April, in 

 the present year. 



The terrestial species are not of particular interest, but 

 some of the fluviatile, and especially those of the genus 

 Pisidium, require to be carefully considered, if only on 

 account of their geographical distribution. It is, perhaps, 

 doubtful whether Pisidium hihernicum and Limnaea involuta 

 have previously been collected so early in the year. In the 

 case of each species mention is made of any peculiarities 

 of its habitat, and of the position of the same in relation 

 to Glengarriff. For the identification of the species of 

 Pisidium Mr. B. B. Woodward is responsible. The terrestial 

 species were submitted to Mr. A. W. Stelfox, of Belfast. 



The following species were met with : — 

 Hyalinia nitidula. 

 Hyalinia pura. 



Hyalinia radiatula and var. viridescsnti-alba. 

 Hyalinia crystallina. 

 Zonitoides excavatus and var. vitrina. 

 Pyramidula rotundata. 

 Cochlicopa lubrica. 



All the above species were found abundantly in the woods im- 

 mediately about the Eccles Hotel. 



Helix aspersa was plentiful, and always very thin of shell. 



Helix nemoralis was not found at all commonly, and the specimens 

 obtained resembled the last species in the extreme tenuity of their 

 shells. 



Limnaea involuta was obtained at Barley Lake, about four miles from 

 Glengarriff, and about i ,000 feet above sea level, where it was first 

 discovered by Mr. R. A. Phillips of Cork. The molluscs were plentiful 

 but difficult to see, all were resting on stones at the water's edge, and 

 individually they were small, only one full-grown specimen was 

 taken. 



A 



