26 BOTANICAL GAZETTE [JULY 
The details of the origin of the blepharoplast of the gamete of 
Zanardinia are similar to those of the zoospore (fig. 22, b), and both 
accord with the account already given of gamete and zoospore of 
Culleria (22). For many years there has been considerable diver- 
gence of opinion as to the origin and nature of the blepharoplasts 
of zoospores and gametes of algae. StRASBURGER (16, 17), from 
an investigation of Oedogonium, Cladophora, and Vaucheria, 
believed that in these forms the cilia are derived from a body 
(blepharoplast) arising in the outer plasma membrane, and Mor- 
TIER (12) gave a similar description for Chara. DANGEARD (5), 
studying Polytoma, de- 
: scribed a blepharoplast 
. we lying at the extremity 
Py AY j of the cell directly under 
4 De i gf ’ the outer plasma mem- 
sf | NY brane, and found a 

re — threadlike structure 
}X Cc (“rhizoplast”) extend- 
b ing from the blepharo- 
ms plast into the cytoplasm 
and sometimes ending at 
the side of the nucleus in 
a granule (‘‘condyle’’). 
TIMBERLAKE (18) noted 
in the zoospore of Hydro- 
Fie, 2 3-—Zoospores sketched from living ma- 
terial: @, in free swimming condition; b, when 
caught among filamentous algae; c, in quiescent 
condition. 
s by delicate fibers, but 
Davis (6) traced the origin of the 
The granules that enter into its com- 
ace of the nucleus and travel along a 
nds to the plasma membrane beneath 
