Algse of the English Lake District . By Wm. West. 737 
Order Protococcace^i (includ. Palhellace,ze). 
Genus Pleurococcus Menegh. 
P. angulosus Menegh. S. 
Genus Trochiscia Kiitz. 
T. aciculifera (Lagerh.) Hansg. 
Diam. s. spin. 20 g, c. spin, 28 g. Bn. 
T. uncinata sp. n. Fig, 54. 
T. cellulis parvis globosis, solitariis vel in familiis parvis 
aggregatis ; membrana cellularum tenui, spinis longis curvatis 
validissimis ornata ; contentum chlorophyllosum granulosum 
cellularum lsete viride. 
Diam. cell, s. spin. 12*5-13*5 g; c. spin. 21-23 /x. 
Bn. 
Genus Palmella (Lyngb.) Nag. 
P. mucosa Kutz. H. 
P. hyalina Breb. R. 
Genus Botrydina Breb. 
B. vulgaris Breb. S. 
Genus Palmodictyon Kiitz, 
P. viride Kiitz. Crummock Water. 
Genus Tetraspora Link. 
T. bullosa (Roth) A g. Lake Side. 
Genus Chlorococcum Frie^. 
C. gigas (Kiitz.) Grun, Bn,, B., R., Hp, 
C. regulare sp. n. Fig. 55. 
C. cellulis subrotundatis, singulis, geminatis (rarius ternis), 
quaternis, vel octonis consociatis ; membrana cellularum sub- 
crassa ; dispositione chromatophorarum parietali cum puncto 
rubro unaquaque cellula ; tegumento hyalino pellucidissimo 
et non-lamelloso. 
Diam. cell. s. teg. 12-15*5 g, c. teg. 36-48 g. 
Eab. amongst Sphagnum and Utricularia, frequent. 
Harrop Tarn and Bowness. Also seen from East Cornwall, 
Devonshire, North and West Ireland. 
It differs from G. gigas (Kiitz.) Grun. in its very hyaline tegu- 
ment not being lamellose, in its thicker cell-walls and in the cells 
being arranged usually in a binate or quaternate manner. 
Genus Gloeocystis Nag. 
G. ampla (Kiitz.) Rabh. H., R., Bn. 
G. vesiculosa Nag, Frequent, 
