Phceocapsacete 



49 



Genus Phaeosphaera West & G. S. West, 1902. The cells 

 are large, exactly spherical, 14 17'5/i 

 in diameter, and are embedded in small 

 aggregates in a cylindrical, gelatinous 

 integument which is sparsely branched. 

 One brown, parietal chromatophore with 

 somewhat irregular margins is present 

 in each cell. 



P. gelatinosa West & G. S. West (fig. 9) is 

 known from Sphagnum-bogs in Cornwall. 



Genus Stichogloea Chodat, 1897 1 . 

 The cells are small, oblong or subovoid 

 in shape, and are associated to form a 

 membranous, gelatinous thallus of small 

 size. The thallus is generally variously 

 lobed and the cells are often somewhat 

 radiately disposed. The cell-walls are 

 firm and each cell contains a parietal 

 chromatophore destitute of a pyrenoid. 



S. olivacea Chodat is known from the 

 plankton of certain of the Scottish lakes. 

 Length of cells 9 15/t. 



Fig. 9. Phaospluera gelati- 

 nosa West & G. S. West. A, 

 portion of colony (x50). B 

 and C, cells showing the solitary 

 chromatophores ( x 410). From 

 Treniethick Moor, Cornwall. 



1 Chodat in Bull. L'Herb. Boiss. torn, v, no. 4, 1897, p. 302, t. 10, f. 812. 



W. A. 



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