PALMELLACEZ. qT 
Sizz. Cells 009-012 mm., fam. -043--09 mm. (Rabdh.). 
Rabh. Alg. iii. p. 29. Kirch. Alg. Schl. p, 112, partly. 
Gleocapsa ampla, Kutz. Sp. p. 216. Tab. 3, f. 3. 
Pleurococcus superbus, Cienk. Bot. Zeit., 20 Jan., 1865, p. 
21. Archer Micr. Journ., 1866, p. 63. 
Fixed to submerged plants. 
Braun states that he has observed an irregular bursting and peeling 
off of the outer coat of multicellular families or sometimes of isolated 
cells surrounded by manifold coats in this species, and G. vesiculosa.* 
Plate 111. fig. 1. Cells magnified 400 diam. 
Gleocystis vesiculosa. Nag. Hinz. Alg. p. 66, t. 4. 
Thallus gelatinous, green; cells small, globose, as many as 
64, and more, associated in families; tegument hyaline, colour- 
less, lamellose, lamellz often breaking up; contents green, 
delicately granular. 
Size. Cells U045--0075 mm. ; fam. ‘036 mm. (Radi.). 
Rabh. ‘Alg. iii., 29. Rabh. Exs., No. 707. 
Glzocystis ampla var. vesiculosa, Kirch, Alg. Schl. p. 112. 
On wood and stones in stagnant water. 
In character this species resembles the last, but the cells are smaller. 
See also Ciénkowski’s paper in ‘“ Botanische Zeitung” for 20 January, 
1865, where this species is figured to the same scale as Gleocystis 
ampla. 
Plate IIT. fig. 2: Cells magnified 400 diam. 
Gleocystis rupestris. (Lyngb.) Rabh. Alg. 111., 30. 
Thallus more or less expanded, dirty green, gelatinous, rather 
firm ; cells globose, middle-size, associated in families ; tegu- 
ment colourless, pellucid, distinctly lamellose, soon diffluent ; 
contents green, granular; sporangia globose, containing from 
4-12 gonidia. 
Size. Cells (0037-005 mm.; fam. ‘06 mm. ; sporang. ‘085 
mm. (Rabdh.). 
Rabh. Krypt. Fl. Sachs. p. 128. Rabh. Exs.1790. Kirch. 
Alg. Schl. p. 112. : 
Palmella rupestris, Lyngb. Hyd. 207, t. 69. Hook, Eng. 
Fl, v. p. 397. 
On rocks, moist walls, and damp earth. 
“Tt occurs as a dirty yellowish gelatinous crust often hanging down 
in flakes from the face of the rock.”—Carm. 
This is not, or only in part, the Hamatococcus rupestris, Hassall (p. 
326, t. 82, fig. 1), which is chiefly applicable to Glwocapsa polyderma- 
tica, K. 
Plate VIIT. fig. 1. Cells magnified 400 diam. a, from wet rocks ; 
b, from damp earth. 
* See Braun, “Rejuvenescence,” Ray Society, p. 182. 
