14 DR. б. S. WEST ON THE ALGÆ OF 
Order PROTOCOCCOIDEZE. 
Family РЕОТОСОССАСЕЖ (or АОТОЗРОВАСЕЮ). 
Genus ANKISTRODESMUS, Corda. 
57. ANKISTRODESMUS FALCATUS, (Corda) Ralfs, Brit. Рехт. (1848) p. 180, 
t. 54. fig. 8; (т. S. West, Treatise Brit. Freshw. Alg. 1904, p. 221. 
Two curious forms of this plant were observed. One, from the May weed- 
collections of the Yan Yean Reservoir (1905), was strongly areuate with 
incurved extremities : lat. Тр; long. max. 94 p ; apice. inter se distantibus 
68 и. (Text-fig. 8, A.) 
1 > 
Fig. 8. 
А and D. Two forms of Ankistrodesmus falcatus, (Corda) Ralfs; C. A. falcatus var. 
acicularis, (А. Br.) G. S, West. All x 500. B and © show fragmentation of the 
chloroplast. 
The other form was almost straight in the middle, but strongly incurved 
at the extremities, which were much attenuated. The chloroplast was 
divided into four segments: long. 116 ш; lat. 32 и. — (Text-fig. 8, D.) 
Genus LAGERHEIMIA, Chodat. 
98. LAGERHEIMIA SPLENDENS, sp. п. (Pl. 6. figs. 4-8.) 
L. conspicua et solitaria ; cellule eylindrieæ eum polis obtuse conicis ; 
setis sublongis, rectis vel curvatis, 3-4 juxta sed infra polum unum- 
quemque, tuberculis expansis et conspicuis ad basin setarum ; membrana 
cellularum sparse et levissime spirostriolata ; chromatophora singula parietali, 
sine pyrenoide (?). 
