30 
5 
this alge, from gatherings kept for some time in the house, had turned 
indeed, be exa £ two objects; with no affinity in any 
respect to each other, still superficially simulating one another. | 
- Moebius says:—‘The families are 70-130 1 in size, of irregular | 
or 
more slender than usual. : : 
Fig. 2 a, family group; 4, single family; ¢, undergoing 
seginentation; d, free mature cells. All magnified 400 diam.— 
Hab.: Waterholes, Victoria Park, Thos. L. Bancroft. Also in Europe and 
North America. 
PROTOCOCCUS, Ag. ; 
Cells spheroid, segregate ; eytioderm thin, hyaline, without 
integument, swimming free, when not growing in water, forming a 
thin pulverulent stratum. Contents in the beginning homogeneous; 
granular, green, or reddish. Propagation by mobile gonidia.— 
Cooke, le. . 
eer sae 
P.infusionum, (Schrank) Kirehn, Cells with envelo pes, about 45 
in diameter, generally distributed.—Moebius. 
Hab.: Burpengary, Thos. L. Baneroft. Common in Europe. 
Famrny.— VOLVOCACA. vosistei 
Cenobia mobile, globose, sub-globose, or quadrangular cH 
flattened, produced from agile biciliate green cells, with a dou 
tile vesicle. ( 
VOLVOX, Linn. : 
— Ceenobium spherical, continually rotating and moving, ee o 
like & hollow globe, composed of very numerous cells arrange ta 
periphery at regular distances, connected by the matrical gelahs — 
"oh “aan Lad Sa Me atta Ree 
