I 00 



OOCYSTIS AND EREM0SPH.?:RA, 



Cell, inuti-ic-. x 20, 40 x 2;"), 12 x 1); autosp. (i x :'), 7 x 4, 7 x f), 

 8 X 1, SJ. X ')},, S X ()//.. 



Parraniatta Park (1 :)(;)•, Aviltunr, Lisniorc, nvci',(272, 27:>). 



('/. Willc, Fcrsk. fra Novaja Semlja, 1N7'J, p/JIn T. xii., f.:'.. 

 Syn., 6>. N^iiifelii ft Xor(r Semljm (Wille) Chodat, Alg. vertes, 

 p. 189; O. Xf'itjf'Hivar. mi7Wi^i*-6'/?>ia Bernard, Prott)cocc. et Desm., 

 1908, p. 172, f.;^55, 356. I cannot consider this a variety of O. 

 Xaijclir. no doubt there is a very close biological connection, but, 

 typically, tliey are entirely different shapes, the latter being 

 oblong or oblong-elliptical with broadly I'ounded ends, while O. 

 Nov(K Semlio' is elliptical with acutely rounded ends. No shape, 

 curiously enough, is mentioned in the description, but the figure, 

 I.e., is distinct. 



Text-fig. 12. —(a) Oocy.<^t!>i Xonv Sem/i<i> Wille, ( x 400); after Wille. (/>) 0. 

 Xont- Sem/i(i' var. ma.rima W. West, ( x 520) ; after West. {c) O. 

 e//!j>tira var. Africana (4. S. West,( x 1000); after (J. S. West. 



Also the ratio of length to breadth is different; in Australian 

 specimens of O. X'ovcf, Semlio', it varies from 1 '4 to 1 7 : 1 "0 as 

 against 2:1 in O. Xdgplii. Moreover, the latter tends to be 

 cylindrical, while the larger sizes of the former are oval, but still 

 retaining a tendency to be pointed at the ends, cf. var. maxima 

 W. West, and var. ausfralica mihi (infra). 



O. X''iyehi var. minutissima Bernard (cells 5-7 x 4 fi) is a size 

 of this species too close to the type to be separated from it; 

 indeed, even f. major Wille, might well be included. Wille's 

 original record for the type is 8 x 5/x. The chloroplast is a 

 single, very thin, parietal lamina. 



Forma ma.ior Wille. (PI. vii., f.l 1, 1 2). 

 Cell, niatric. diam. 20, 24, 40; long. 24, lat. 14; autosp. 10 x 6, 

 10x7, 12x6, 12x7, 12 x S/i. 



