8 



THE JOURNAL OF BOTANY 



the cell-margins. The massive chloroplast contains one pyrenoid 

 of moderate size or very rarely two smaller pyrenoids (tig. 5 C). 

 The stigma is conspicuous and situated slightly in front of the 

 pyrenoid in a lateral position. The nucleus is in the anterior 

 hollow of the chloroplast and approximately on a level with the 

 stigma. 



Fig. 5. — Pteromonas angiilosa. Four specimens, x 1000. /', front view; 

 s, side view ; e, end view. In C the cell possesses two pyrenoids instead of one. 

 (From drawings by Dr. H. Takeda.) 



Telling" has recorded ''Pteromonas angidosa (Stein) Dang." 

 from near Stockholm (in the plankton), but the brief note and the 

 figure are insufficient to determine whether the Sw^edish specimens 

 belong to this species or not. In all species of Pteromonas the 

 lateral view of the cell is essential for correct specific determination. 



Playfairf has recently described and figured ''Pteromonas 

 alata var. australis Playfair " from Lismore in N.S. Wales, but 

 neither the description nor the poor figure is sufficient to be certain 

 of its specific identity. He gives no cytological details, nor does 

 he describe or figure the side view of the organism. 



2. Pteromonas Takedana sp. nov. [= Pt. angulosa as recorded 

 by G. S. West in Journ. Bot., vol. 1, Nov., 1912, p. 330, fig. 5 

 A and B.] 



A Pt. angulosa differt cellulis fere paullo majoribus, corpore 

 intra membranam exteriorem a latere et a vertice viso elliptico 

 et integro non excavato ; pyrenoide singulo magno. 



* E. Telling, " Schwedische Plauktonalgen, I," Svensk Botanisk Tidskrift, 

 Bd. 6, no. 2, 1912. p. 272. fig. 2. 



t G. I. Playfair, " Freshwater Algae of the Lismore District, etc.," Proc. 

 Linn. Soc. New South Wales, xl, part 2, July, 1915. [N.B. — It is unfortunate 

 tliat this author's work is not supervised. It is mostly superficial and.fvery 

 inaccurate in character. In the present paper he describes what appear to be 

 the eggs of Tardigrades as new species of Trochiscia, a genus of the Proto- 

 coccales which he places in the Fungi !] 



