BY G. I. PLAYPAIR. 



139 



Forma minor W. West. (Text-fig.24). 



" F. cellulis minoribus, If-plo longioribus qiiam latioribus, 

 singula vel in familiis e 4 ceUulis compositis." West, I.e., p. 14, 

 Pl.ii., i.2S. 



The author records the dimensions as Fam. 4 cell. 7Gx63/j.; 

 long. cell. 36-2-40, lat. cell. 26-28-5/-1. 



Var. INCRASSATA W. West. 

 (Text-fig. 25). 



"Var. membraua cellularum in- 

 crassata et apicibus incrassatis et 

 subprotuberantibus." W. West, I.e., 

 p.l4, Pl.ii., f.37. 



The dimensions given are, long. 



cell. 56 fi, lat. cell. 39 /x. Quite a 



different shape from that figured as 



the type; it would be better placed ^ ^ ,. 



""^ ^ Text-fig. 2o. 



as a variation of 0. nodulosa W. q gi,j^g ^^r. incrassata W. West, 



West, I.e., PI. ii., f .31 . ( x 520); after W. West. 



OocYSTis PUSiLLA Hansgirg. 



Mentioned by W. ifc G. S. West, in Notes on Frw. Alg., Journ. 

 Bot., 1899, p. 335, where it is compared with O. jmrva W. & G. 

 S. West. I do not know in what publication it is described. 



OocY'STisC?) BRUNNBA Turn. (Text-fig. 26a). 



" Cell with pale brown mucous contents, of an oblong form, 

 contained in a proper membrane, having two orbicular cells 

 placed in the direction of its long axis, which nearly fill up the 

 entire length, and are pressed closely together at the centre. 

 These cells appear filled with perfectly clear colourless fluid or 

 mucus, and have at their inner mai-gins each a reddish-brown 

 granular nucleus. Outer cell-membrane punctated. Long. 3S, 

 lat. 27 /x." Turner, I.e. (Wallich MS. No. 348). 



Cy. Turner, Alg. E. Ind., 1892, p. 156, T. xxi., f.7. Both 

 figure and description are taken from Wallich's manuscript. The 



