tgi8. Phillips & Stelfox. — Range of Pisidium hibernicum. 39 



P. hibernicum), H. Overton' (who sent us no less than ninety 

 carefully localized gatherings of Pisidia, mainly from his 

 own district), C. Oldham (for permitting us to examine his 

 collection of Pisidia from the Welsh tarns), Hans Schlesch of 

 Hellerup, Denmark (for permission to study his collection 

 from Iceland and Scandinavia), and Robt. J. Welch for 

 placing the whole of his collection at our disposal. The 

 specimens in the National iMuseum in Dublin have also been 

 available to us through Dr. R. F. Scharff' s kindness. 



IRISH RECORDS FOR P. HIBERNICUM. 

 Contractions used: — H.C.H. = H. C. Huggins ; K.H.J. = K. H. Jones; 

 J.N.M. =: J. X. Milne ; H.O. = H. Overton ; CO. = C. Oldham ; 

 J.W.J. = J. W. Jackson; R.F.S. = R. F. Scharff; NrH.F. =N. H. 

 Foster; R.J.W. = R. J. Welch; H.T. = late Major Trevely an ; 

 D.M. =in Dublin Museum; R.A.P. & A.W.S. = the writers. 



X^OTE. — The Remarks refer to P. hibernicum alone and not to the asso- 

 ciated species of Pisidia. 



South Kerry. 



Loc. — -Lough Nagarriva, a large tarn with bed of rocks and peaty mud. 

 Coll.— R.F.S., J.X.M., A.W.S., R.A.P., K.H.J, and H.C.H., 1893- 

 1913. Alt. — 1, 200 feet. Assoc. — P. lilljeborgi, P. milium and P. 

 obtusale. [Species other than Pisidia are not referred to since they can 

 scarcely be said to be " associates "]. PI. I., figs. 9, 10. 



Loc. — Lough Tooreenmartin, Dingle Promontory, a large, shallow tarn, 

 with clear water and stony bed. Coll. — A.W.S., Sept., 1910. Alt. — 

 1,200 ft. Assoc. — P. nitidum and P. lilljeborgi, collected at the roots 

 of Isoetes. Remarks — Recorded by A.W.S. as P. obtusale in I. Nat., 

 vol. xxiv., p. ^^. 



Loc. — Tarns in Coumaknock, on Brandon Mt., Dingle Promontory. 

 These tarns are mostly lying in rock-basins and have clean, very cold 

 water and little mud or silt. Coll. — A.W.S. and R.J.W., Sept., 

 1910. Alt. — 650 to 2,300 ft. Assoc. — P. casertanum, P. nitidum, 

 P. milium, and P. obtusale- Remarks — Recorded by A.W.S. as P. 

 obtusale in /. Nat., vol. xxiv., pp. 21 and 33. PI. I., figs. 5, 6. 



Loc. — Clogharee Lough, in valley north of Connor Pass, Dingle Promon- 

 tory, a small shallow lake with stony bed. Coll. — A.W.S., Sept., 

 1914. Alt. — 100 ft. Assoc. — No other Pisidia seen. 



X'^ORTH Kerry. 

 Loc. — Lough Crincaum, Cromaglaun Mt., near Killarney. Coll. — E. 

 Collier, July, 1898. Assoc. — Xo other Pisidia seen. Remarks — 

 Recorded by R. Standen as P. nitidum in /. Nat., \o\. vii., p. 226. 



1 We learn from Mr. Overton that, some years ago, he suspected that 

 some of his shells might be referable to P. hibernicum, but he was unable 

 to obtain confirmation of this. [Note added in press]. 



