55 
PHEOPHYCER. 
O 
ECTOCARPUS, Lyng. 
E. indicus, Sonder. Prof. Askenasy says :—‘‘Amongst the Algw 
which were collected on the voyage of exploration of H.MS. ‘ Gazelle’ 
was this Ectocarpus, growing upon sargassum from Moreton Bay, and 
E. indicus occurred likewise, adhering to the stalk of Acetabularia. 
sg t 
may be distinguished a series of continuous rapid cell-division, but 
generally the cell-division is intercalary and lasts a long time. 
Allthe branches are prolonged into hairs, which often attain & 
very appreciable length, whilst new cells of the filament are constantly 
elongating, losing their contents, and becoming hair-cells. (See the 
aon Plate XIV., Fig. 4.) Likewise towards the end of the main- 
axis, the formation of hairs on the branches becomes very considerable. 
oo for example, a branch of 1°5 mm. in length consists of only 
7 f 
