742 
Transactions of the Society . 
C. schizodermaticus sp. n. Figs. 61-63. 
C. cellnlis subglobosis vel subtrigonis, nonnunquam sub- 
reniformibus, binis vel terms, quaternis in familiis consociatis ; 
familiis solitariis vel 2-4 aggregatis ; tegumento crassissimo, 
stramineo vel fuscescente, valde lamelloso (lamellis 5-10), 
demum irregulariter discedente ; cytioderruate subcrasso ; 
cytioplasmate seruginoso et granulato. 
Diam. transv. cell. s. teg. 5*8-11 ya, c. teg. 21-38 /x; 
diarn. long. cell. s. teg. 5-7 * 6 /x, c. teg. 27-42 /x. Near 
Windermere. 
This is at once distinguished from all other species by the peculiar 
thick, splitting tegument similar to that of TJrococcus insignis (Hass.) 
Kiitz. (Chroococcus macrococcus Eabh. et var. aureus Babh.). 
Genus Gloeocapsa Nag. 
G. atrata Kiitz. Langdale. 
G. caldariorum Babh, H. 
G. polydermatica Kiitz. Sk., near Windermere. 
G. quaternata (Br6b.) Kiitz. Bow Fell, near Angle Tarn. 
G. aeruginosa (Carm.) Kiitz. Langdale. 
*G. punctata Nag. (Gatt. einz. Alg., t. i. F, f. 6). 
Diam. cell. s. teg. 0*8-1 fx. Langdale. 
Genus Aphanocapsa Nag. 
*A. pulchra (Kiitz.) Babh. (FI. Eur. Alg., ii. p. 49). 
Diam. cell. 2*5-3 /x. Bn. 
A. Grevillei (Berk.) Babh. B., Bn., S. 
Genus Microcystis Kiitz. 
M. protogenita (Bias.) Babh. Bn., near Cockermouth, Esthwaite 
Water. 
M. marginata (Menegh.) Kirchn. Bn. 
Genus Clathrocystis Henfrey. 
C. aeruginosa (Kiitz.) Henfrey. Bn. 
Genus Coelosphaerium Nag. 
C. Kiltzingianurn Nag. Bn. 
Genus Merismopedia Meyen. 
M. glauca (Ehrnb.) Nag. Very frequent. 
M. aeruginea Breb. Bn. 
M. irregular e Lagerh. Hp. 
Genus Synechococcus Nag. 
S. aeruginosus Nag. H., Langdale. 
S. crassus Arch. Bn., Kirk Fell. 
