206 CYSTIPHORA. 
the appearance of being covered with pitch ; on places where it becomes 
dry by exposure to the sun it is very friable, and on being touched 
crumbles down to a powder.’’— Moore, in Hass. loc. cit. 
Plate LXXXIIT. fig. 5. Gleocapsa livida, drawn from Carnuchael’s 
original specimen X 400. 
Gleocapsa caldariorum. Rabh. Alg. Eur. 37. 
Thallus irregular thick gelatinous, pale yellowish, cells soli- 
tary, globose or rather elliptical, tegument spherical or elliptic, 
colourless lamellose, lamelle often diffuse, the externally one 
manifestly diffluent; cell-contents homogenous, or rather 
granulose, pale blue-green. 
Sizz. Cells 003-006 mm. with envelope :019--04 mm. 
Gleocapsa montana var. caldarii, Suringar Obs. 54, t. 4, f. 
x. Kirch. Alg. Schles. 257, 
On walls, flower-pots, glass, &c., in conservatories and green- 
houses. 
Plate LXXIIT. fig. 6. Cells magnified 400 diam. 
Gleocapsa polydermatica. Kutz. Tab. 1, ¢. 20. 
Thallus gelatinous, more or less compact, dirty green, or olive 
becoming brownish; cells small spherical, tegument very thick, 
hyaline lamellose, lamelle numerous, concentric, firm; cell- 
contents verdigris green, almost homogenous. 
Size. Cells -003-0045 mm.; with envelope :023 mm. 
Families ‘05 mm. 
Rabh. Alg. Eur. ii., 87. Kirch Alg. Schles. 257. 
Microcystis rupestris, Meneg, Nost. 72, t. 9, f. 1. 
Hematococcus rupestris, Hass, Alg, 326, t. 82, f. 1. 
On moist rocks. 
“Frond hyaline, gelatinous, yellowish green, easily broken up, about 
an inch in diameter, shapeless, rough, pellucid, more or less dense in the 
centre and elevated; when dried collapsed, blackish, cartilaginous, 
fragile. Subjected to the microscope it appears constituted of hyaline 
subspherical vesicles, enclosing yellowish green, spherical or slightly 
oblong globules usually undivided. Solitary globules, magnified with 
glasses less powerful are seen free and naked; by means of a more 
powerful microscope, almost all are perceived to be clothed with a proper 
cyst, larger vesicles enclose smaller, and the whole frond appears areo- 
lated, the hollow areole containing solitary or binate globules, The 
vesicles general as well as partial, duplex, triplex, or multiplex, and that 
without any perceptible order, commonly present concentric circles, 
generally approximated, evident to the light.”— Meneghini. 
Plate LXXXIII. fig.7. Cells magnified 400 diam. 
Gleocapsa quaternata. Kutz. Tab, 1, t.20,f. 1. 
Thallus mucous, effused, dirty green, becoming reddish 
brown; cells usually spherical, single or twin or quaternate 
