THE YAN YEAN RESERVOIR, VICTORIA, 45 
The present chapter deals only with those species observed in Mr. Нагу 
collections which are deemed worthy of special mention, either because they 
have not previously been described, or because the Australian specimens have 
furnished new facts concerning them. 
It is difficult to say which of the following 68 species should be regarded 
as the most interesting, but one could with justice include in such a selection 
Ulothriv idiospora, Radiofilum conjunetirum, Debarya Mardyt, Micrasterias 
Hardyi, Staurastrum victoriense, Lagerheimia splendens, Rhizosolenia morsa, 
Gyrosiyma elongatum, and Peridinium Уой var. australe. 
Class CHLOROPHYCEZE. 
Order OEDOGONIALES. 
Family OEDOGONIACEZ. 
Genus OEDOGONIUM, Link. 
1. Овросохісм suECICUM, Wittr. in Botan. Notiser (1812) p. 5; Hirn, in 
Acta Soc. Seient. Fenniew, xxvii. (1900) p. 82, t. 2. fig. 15. 
Forma AusTRALIS. — (Text-fig. 6, E.) 
Forma cellulis vegetativis paullo erassioribus ; echinis robustioribus et 
sparsioribus. 
Crass. cell. veget. ..... .... 14-16 ш; altit, 4-5-plo major ; 
» ОООЙ, cece es eo. d0-41 u; „ 40-41 u; 
, oospor. (sine echin.) 81-88 p; „ 251-58 p. 
Long. echin. 2°5-3 д. 
Hab. Yan Yean Reservoir, at the weedy margin (Nov. 1905). 
2. Окросохим OBLONGUM, Wittr. in Botan. Notiser (1872) p. 25 Hirn, 
ре. p. 155, t. 29. fig. 181. 
Crass. cell. veget. ...... 65-15 ws altit. 4-8-plo major ; 
yy ООО... . 20-24 ws „ 46-60 ш; 
„ оозрог. ......... 19-22 wp; „ 34-50 p. 
Hab. Yan Yean Reservoir, among the weeds (in fruiting condition Nov. 
and Dee. 1905). 
3. OEDOGONIUM MONILE, Berk. § Harv. in Hook. f. Flora Tasmanir, V. 
(1860) p. 342, t. 196. fig. В; М, Le. р. 229, t. 38 et 29. fig. 255. 
Forma vicroRIENsE. (Text-fig. 6, А & В.) 
Forma paullo major ; nannandribus elongatis et angustioribus, in cellulis 
suffultioriis sedentibus. 
