WEST: ADDITIONS TO FRESHWATER ALG. 245 
Closterium leibleinii Kiitz. Moughton Fell; Askern; Rawcliffe 
Common. 
Closterium dianz Ehrnb. Moughton Fell; Malham Tarn; 
Rawcliffe Common; Askern. 
Closterium venus Kiitz. Rawcliffe Common. 
Closterium striolatum Greetland near Halifax. 
Closterium rostratum Ehrnb. Greetland near Halifax. 
Closterium setaceum Ehrmb. Rawcliffe Common. 
Closterium cornu Ehrnb. Moughton Fell; Greetland near 
lifax. 
*Closterium pronum Bréb. Rawcliffe Common. 
Penium oblongum DeBary. Whernside; Greetland near 
Halifax. 
Penium truncatum Bréb.*ForMa punctata. Forma membrana 
distincte punctata. Leeming; Greetland near Halifax. 
Cylindrocystis diplospora Lund. Whernside. 
Cylindrocystis crassa DeBary. Moughton Fell. 
Tetmemorus brebissonii Ralfs. *Var. y (DeBary) Archer. 
Penyghent. 
Tetmemorus eronuiate Ralfs. Rawcliffe Common; Greetland 
near Halifax 
Euastrum verrucosum Ehmb. Rawcliffe Common. 
Euastrum oblongum Grey. Rawcliffe Common. 
Euastrum pectinatum Bréb. Malham Tarn. 
Euastrum elegans Bréb. Malham Tarn. 
Euastrum binale (Turp.) Ralfs. Ribblehead. 
Cosmarium hammeri Reinsch. *Forma rotundata (Wille) 
Boldt. (Desm. Gronl., p. 14). [Syn. C. Aomalodermum Nord. 
var. rotundatum W ille. (Nov. Seml. Alg., p. 36, t tab. xil, 
fig. 18).] Malham Tarn. 
Cosmarium anceps Lund. Baildon. 
*Cosmarium granatum Bréb. Malham Tarn; Baildon. 
*Var. subgranatum Nord. Baildon. 
Cosmarium cucumis Corda. Moughton Fell. 
Cosmarium pyramidatum Bréb. Moughton Fell; Saltaire. 
Cosmarium pseudopyramidatum Lund. Malham Tarn. 
“Cosmarium galeritum Nord. Malham Tarn. 
*Cosmarium phaseolus Bréb. Malham Tarn, Long. 204; 
lat. 19m; lat. isthm. 4p. 
August ré9r. 
