NAIADACER. 289 
P. polygonifolius Pour. 
Native. B. Moorland rills, pools, and ditches. Frequent; locally plenti- 
ful. P. July-Aug. 
First record, B. & N., J.B., 1884. 
Gl. Kinderscout; Charlesworth Coombs, var. ericetorum, Hl. Ashton. R. 
Westend, Gibbs. Near the Snake Inn; on Nether Moor, near Jaggers Clough; 
Bamford Moor; Callow Bank, above Hathersage; Roych Clough, Chapel-en-le- 
Frith. 
G2. Rills on Tansley Moor, B. dé N., J.B. Offerton Moor, Gibbs. Swampy 
woodland, near Hathersage Booths and above Padley Wood; under Harland 
Edge, Beeley; Umberley Brook, Chatsworth; Dethick Common. 
C. Damp ground, above Seymour, near Chesterfield. 
Tl. Hulland Moss, sparingly, in the upper part. 
T3. Repton Rocks; a specimen of Bloxam’s named xatans is clearly this 
species, Purchas, J.B. 
P. alpinus Bald. P. rufescens Schrad, 
Native. B. Ponds, slow streams. Rare. P. July-Aug. 
First record, Purchas, J.B., 1887. 
G2. Small pond not far from Bar Brook Hall, Chatsworth. 
T3. Archer’s Pool: found also by Mr. Bloxam in one of the Calke Ponds, 
Purchas, J.B. 
P. lucens L. Top. Bot. ‘‘ Howitt cat.” 
Native. EB. Rivers, canals, pools. Rather rare. P. June-Aug. 
First record, Glover, 1829. 
C. Canal near New Stanton. 
T2. Breadsall, Whittaker, Phyt. 
T3. Canal near Willington, Gibbs. By Anchor Church, Hb. Mason ! 
Near Calke Abbey. The specimen too imperfect to allow of certainty, Purchas, 
J.B. 
P. prelongus Wulf. 
Native. SI. Canals, pools. Rare. P. July-Aug. 
First record, N.H. Tutb., 1863. 
T2. Canal between Osmaston and Chellaston, and between Chaddesden 
and Spondon. 
T3. Canal near Willington, Nowers! Canal near Burton, N.H. Tutb. 
P. perfoliatus L. 
Native. B. Streams, canals, ditches. Frequent. P. July-Aug. 
First record, Glover, 1829. 
G2. Canal at Whatstandwell, B. d N., J.B. 
C. Near Marple’s Bridge, Renishaw, Waterfall. Canal near Kirk Hallam, 
Killamarsh, and near Shipley Gate; New Stanton. 
Tl. Findern, Bindley. Brailsford Brook; Marston-on-Dove; brook near 
Barton Fields; in the Dove, Sudbury. 
U 
