CRYPTOMONADINA 187 



brownish green; nucleus dorsal; a central pyrenoid; 2 contractile 

 vacuoles; with reddish globules; fresh water. 



N. olvacea S. (Fig. 89, h). 20-25// by 15^. 



Genus Protochrysis Pascher. Reniform; not flattened; with a 

 distinct furrow, but without cytopharynx; a stigma at base of 

 flagella; 1-2 chromatophores, brownish yellow; pyrenoid central; 

 2 contractile vacuoles; fission seems to take place during the rest- 

 ing stage; fresh water. 



P. phaeophycearum P. (Fig. 89, i). 15-17/1 by 7-9iu. 



Suborder 2 Phaeocapsina Pascher 



Palmella stage predominant; perhaps border-line forms be- 

 tween brown algae and cryptomonads. Example: Phaeothamnion 

 confervicolum Lagerheim (Fig. 89, j, k) which is less than lOfx 

 long. 



References 



Fritsch, F. E. 1935 The structure and reproduction of the algae. 



Cambridge. 

 Pascher, A. 1913 Cryptomonadinae. Siisswasserflora Deutsch- 



lands, etc. part 2. Jena. 

 West, G. S. and F. E. Fritsch. 1927 A treatise on the British 



freshwater algae. Cambridge. 



