BY G. I. PLAYFAIR. 335 



Cf. Gorosch., I.e., p. 106, PI. i., f.9; Wille, I.e., p. 141, T.iv., f.14. 

 Chi. DeBaryana is ovate, with a large protruding papilla in front; 

 long. 12-20 ju, Gorosch. As found here, it is certainly a young 

 growing form of Chi. pisiformis Dill. 



Genus C a r t e r i a Diesing. 

 Cartkria ovata, n.sp. (PL xliv., f.l7.) 



Cellulse ovatse fronte late-rotundatse non excavatse, postice 

 attenuates acutae; chloroplastidibus non observatis; endochromate 

 dense granulate; pyrenoidibus (ut videtur) nullis. 



Long. 16, lat. 12, flagell. 4, circa 15/x long. 



Lismore(259). 



Obtained, as usual in this genus, from rainwater pools, in some 

 quantity. 



Genus Pteromonas Seligo. 

 Pteromonas alata var. australis, n.var. (PI. xlii., f.l4 ) 



Cellulae ipsse ovatse, fronte attenuatse acuminatse, postice late- 

 rotundatse. Membrana investiens, tenuis, hyalina, modice rect- 

 angularis lateribus parallelis, a tergo latissime rotundata angulis 

 nullis, a fronte medio producto atque angulis etiam. Endo- 

 chroma densum, granulatum. 



Membr. long. 21, lat. 16; cell. long. 18, lat. 12 /x. 



Lismore(247). 



Genus Phacotus Perty. 

 Phacotus rectangularis, n.sp. (PI. xlii., f.l5; PI. xliii., f.2.) 



Cellulae a fronte visae circulares; margine scabra; papilla parva 

 inter setas duas; jugis humilibus arcuatis 3-4 decussatim dis- 

 positis ornatae; a latere rectangulares apicibus truncatis; lateribus 

 levissime arcuatis jugis humillimis 3 notatis. Membrana aspera, 

 dilute luteola. Autosporae ovales. 



Long. = lat. = 18-22; crass, c. 10 ft. Cell, matric. long. 22, lat. 

 24 ft. 



Lismore(244, 246). 



Differs from Ph. lenticularis (Ehr.) Stein, and Ph. Lendneri 

 Chodat, in its rectangular side-view, and the more or less regular 

 curved ridges across the face Cf. Chodat, Alg. Yertes, p. 147, 

 f.71,72. 



