520 NEW AND RAIiE fRESHWATER ALG/£, 



Cf. Stein, Natiirg. d. Flagell., i., T. xv,, f.46 : Gorushankiii, 

 Morpb. 11. System, d. Chlamyd.^ ii., p. 131, PL iii., f.26: Wille, 

 Alg. iS'otizen ix.-xiv., p. 146, T. iv., f.22. Goroshankins figure 

 (reproduced by Wille) differs from the type in being a short oval: 

 whereas Stein's figure is a long oval, subcylindrical. Our speci- 

 mens agree with the type in outline and in proportions (Steiiis 

 figure works out at 20 x 11/x), but differs in the position of the 

 stigma, which is near the end in the type, but subapical in ours. 

 Goroshankin makes it hemispherical, here it was wick-shaped. 

 The upper pyrenoid was laterally disposed, and perhaps was 

 geminate, or becoming so; Goroshankin notes the occuri'ence of 

 two pyrenoid s in front. 



Chlamydomonas paupercula, n.sp. (PL Iv., f.21, 22). 



Cellulae longo-ovata?, subelliptica?, in medio latissimte, pone 

 paullo angustatsB, fronte conicae; apice obtuso paullo producto; 

 membrana tenuissima inconspicua arete adhterente; chloroplastide 

 crassa parietali, granulis sparsis superficie exteriore vel interiore 

 dispositis; stigmate nullo nee pyrenoidi (in speciminibus uotatis). 



Long. 14-17, lat. 6-8//. Lismore. 



In shape and size, very like Chi. alboviridis Stein, Naturg. d. 

 Flagell., i., T. xiv., Abt. vi., f,l, 2, 21; (figures 1, 2 work out at 

 26 X 13//, fig. 21 at 17 X 8/x). The cell is elliptic, conical in front, 

 the apex obtuse and slightly produced; membrane very thin. 

 The chloroplast is massive and parietal, with scattered granules 

 sometimes on the outer surface, sometimes on the inner. Though 

 viewed with the yV obj., the nucleus was not discernible; pyre- 

 noid and stigma absent. 



Chlamydomonas pusilla, n.sp. (PL Iv., f.23). 



Cellula3 ovata?, ubique rotundatJie; apice obtuso baud producto; 

 membrana tenuissima, inconspicua, arete adhjerente; chloroplast- 

 ide crassa, parietali; intus granulata; nucleo in media cellula; 

 stigmate mediano; pyrenoidi nullo viso. 



Long. 30, lat. 20//. Lismore (350). 



Cell broadly ovate, rounded off" everywhere, obtuse in front 

 and without projection. Chloroplast massive, parietal, granulate 



