10 
defined boundaries, enclosed by chlorophyllaceous matter evenly 
diffused. Cellular membrane somewhat thickened, slightly gelatinous 
(as in Enteromorpha), extending into long, slender, unjointed bristles 
ns 
of e substance, slightly thickened at the base, and existin 
singly or i ere ; s with single nucleus. Propagation by 
zoogonidia, which originate by successive divisions (2-4 f the cells 
h gonidia oblongo-ovate and of ing size, have each a pyre- 
afterwards ruptured. The zoogonidia, after swimming freely for about 
half-an-hour, become stationary. They are then surrounded with a 
somewhat wrinkled investment, and affixed to a substratum by a 
hyaline portion. They afterwards spread out, and soon after germi- 
nate. neration by sygotes resulting from the conjugation of 
biciliate zoogonidia, originating in one or two vegetative cells. 
me; yet they might also belong to Ch. orbicularis, Berth. th 
species differ from each other chiefly with regard to the swarmspores.” 
Hab. : Burpengary, Thos. L. Bancroft. Also fcund at Tahiti and Guadalupe. 
Famity ITl1.—GDOGONIACER (Wittr.), De Bary. 
Moneecious or dicecious alow. Filaments articulated, either simple 
rather thinner). Spermatozoids produced in abbreviated special cells 
(spermogonia). 
EDOGONIUM, Link. 
_ Articulated filament simple, at first fixed, afterwards free, 
* dicecious; w en diwcious the male plants either dwarf—produ 
rom short cells of the female plants—or elongated and independent. 
Propagation by asexual-zoospores, and by oospores sexually fertilized. 
—Cooke’s British Freshwater Algew, 148 
