46 The Irish Naturalist. March, 



iMANX RECORD FOR P. HIBERNICUM. 



Isle of Man. 



Loc. — Marshes near the Point of Air. Coll. — F. Balfour Browne, July, 

 1910. Alt. — Sea level. Assoc. — P. casertanum, P. nilidum, P. 

 milium and P. subtruncatum. 



ENGLISH RECORDS FOR P. HIBERNICUM. 



Surrey. 



Loc. — Ditch in field near Merton Abbey station, London, S.W. Coll. — 

 A.W.S., April, 1907. Alt. — About 30 ft. Assoc. — P. henslowanum 

 and spp. 



Loc. — Ditch by the towing path, Kew Gardens. Coll. — A.W.S., May, 

 1907. Assoc. — P. milium, P. subtruncatum, and P. henslowanum. 



Hertfordshire. 



Loc. — Fishpond, Aldenham Abbey (this pond is connected with the River 

 Colne). Coll. — CO., May, 191 7. Assoc. — P. amnicum, P. nitidum, 

 P. subtruncatum and P. henslowanum. Remarks — Mr. B. B. Wood- 

 ward agrees with this determination. 



Loc. — Brook at Cassio Bridge, Watford. Coll. — CO., Aug., 1917. 

 Remarks — Mr. B. B. Woodward [in litt. to CO.) says, " To my mind 

 these are P. nitidum." 



Buckinghamshire. 



Loc. — Iver. Coll. — J. E. Cooper. 



Loc. — Canal at Dcnham Lock. Coll. — J. E. Cooper. 



Cambridgeshire. 



Loc. — " Wicken Fen. Ex. F. Taylor." Remarks — In possession of Mr. 

 J. W. Jackson. 



Northamptonshire. 



Loc. — River Nene at Northampton. Coll. — CO., Aug., 1917. Assoc. — 

 P. amnicum, P. casertanum, P. nitidum, P. milium, P. subtruncatu)n, 

 and P. henslowanum. 



Warwickshire. 



Loc. — Stream near Windmill, Yardlcy Wood. Coll. — H.O., Sept., 191 1. 



Assoc. — P. nitidum and P. subtruncatum. 

 Loc. — Longmoor Pool (7a. 3r. i6p.), Sutton Park (\ery muddy and peaty, 



caused by dead leaves, &c.). Coll. — H.O., 1894. Assoc. — P. 



