42 The Irish Naturalist. March, 



Woodward, and recorded as such by A.W.S. in Proc R. I. Acad., 



vol. xxxi., part i^, p. 29. 

 Loc. — Lough Nakeeroge (East), Achill Island. Coll. — A.W.S., June, 



191 1. Alt. — 15 ft. Assoc. — P. nitidum. 

 Loc. — Creevaghaun Lough, near Newport. Coll. — A.W.S., June, 191 1. 



Alt. — About 30-50 ft. Assoc. — P. nitidum and P. miliuin. Remarks 



— P. obtusale, fide Mr. B. B. Woodward. See Cat., p. 125. 



Sligo. 



Loc. — Lake in sand-dunes at Rosses Point, a shallow lake with sandy bed 

 Coll. — A.W.S., July, 1904. Alt. — About 10-20 ft. Assoc. — P. 

 uitidmii. Remarks — Recorded in /. Nat., Sept., 1904, as P. obtusale 

 by A.W.S. 



Louth. 

 Loc. — Lake near Dundalk. Coll. — R.A.P., Sept., 1917. 



MONAGHAN. 



Loc. — Ulster Canal south of Monaghan Town. Coll.^A.W.S., 1909. 

 Assoc. — P. nitidum, P. milium and P. subtvuncatum. 



East Donegal. 



Loc. — Lougli Acapple. Coll.^D.M. (H.T.). Remarks — Identified by Mr. 

 B. B. W^oodward as P. steenbuchii Moller. See Irish Nat., vol. xx., 

 p. 46, 191 1. [I understand that this record has been withdrawn by 

 Mr. Woodward and for it P. lilljeborgii has been substituted. — A.W.S.]. 



Loc. — ^Lough Meenaskeagh. Coll. — D.M. (H.T.). Remarks. — Identified 

 and recorded b}- Mr. B. B. Woodward as P. personatum Malm. 

 See Irish Nat., vol. xxi., p. 96, 191 2. PI. II., figs. 3, 4. 



West Donegal. 



Loc. — Mullaghderg Lough, north of Burton Port. Coll. — A.W.S., Sept., 



1903. Alt.— About 15-20 ft. Assoc. — P. nitidum, P. milium, P. 



subtvuncatum, and P. lilljeborgi. Remarks — Recorded in /. Nat., 



vol. XV., p. 66, as P. obtusale, by A.W.S. 

 Loc. — Dunmore Lough, Carrickfin Peninsula, Bunbeg. Coll. — A.W.S. 



Sept., 1905. Alt. — About 30-40 ft. Assoc. — P. nitidum, P. milium, 



and P. subtruncatum. 

 Loc. — Carnboy Lough, Carrickfin Peninsula, Bunbeg, a large lake wiih 



sandy bottom. Coll. — A.W.S., Sept., 1908. Alt. — About 10-20 ft. 



Assoc. — P. nitidum, P. milium, P. subtvuncatum and P. obtusale. 



Tyrone. 



Loc. — Washing Bay, Lough Neagh (in drift). Coll, — A.W.S., Feb., r^o6. 

 Alt.— 4O ft. 



