PALMELLACE.E. 7 



SIZE. Cells -009- -012 mm., fam. '043--09 mm. (Rabh.). 

 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. 



Brann 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 6f. vesiculosa.* 



Plate 111. fig. 1. Cells magnified 400 diam. 



Glaeocystis vesiculosa. Nag. Einz. 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, lamellae often breaking up ; contents green, 

 delicately granular. 



SIZE. Cells 0045--0075 mm. ; fam. '036 mm. (Rabh.). 



Rabh. Alg. iii., 29. Rabh. Exs., No. 707. 



Gl&ocystis 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 Cienkowski's paper in " Botanische Zeitung " for 20 January, 

 1865, where this species is figured to the same scale as Glceocystis 

 ampla. 



Plate III. Jiff. 2. Cells magnified 400 diam. 



Glaeocystis xupestris. (Lyngl.) Rabh. Alg. in., 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. (Rabh.). 



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. 



" It 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 Hcematococcus rupestris, Hassall (p. 

 326, t. 82, fig. 1), which is chiefly applicable to Gl&ocapsa polyderma- 

 tica, K. 



Plate VIII. Jiff. 1. Cells magnified 400 diam. a, from wet rocks ; 

 b, from damp earth. 



* See Braun, "Rejuvenescence," Ray Society, p. 182. 



