25 
RHIZOCLONIUM, Kuetz. | 
Articulate thread the same as in OConferva, but distinctly 
contorted, and forming by prolification of the cells short root-like 
processes.—Cooke’s British Freshwater Alga, 140. 
R 
fo 
ming thin webs or mats of considerable extent on moist ground. 
lame 
first as a ring-shaped mark in the middle of the cell.” ; 
_This species is known from Europe, North and South America; 
vaneties of it also from New Zealand. 
Hab.: Burpengary, Dr. Thos. L. Bancroft. 
(Plate VIL. Fig 5.) eee 
CLADOPHORA, Kuetz. 
_ Articulate thread variously branched; cell-membrane usually 
thick, lamellose; cell-contents parietal. Propagation by zoogonidia, 
arising from simultaneous and multipartite division of the cell- 
contents, moving actively within the mother-cell, afterwards escaping 
a lateral or terminal opening, furnished with 2 or 4 vibratile 
cilia, afterwards germinating without fecundation.—Cooke’s British 
Freshwater Algw, 141, 
t. Cooke notes that many species are entirely marine, but some 
few are fresh water. All are disposed to considerable variation, and 
Tumerous varieties are named in connection with each of the fresh- 
"ater species. 
— G. parvula, Moebius (n. sp.). Prof. Moebius says:—“ in my 
former work I have it oon Siciene my surprise that the Cladophore 
oe so abundantly in our waters were wholly absent from the 
Australian freshwater alge sent by Mr. Bailey ; certainly none of 
8% meer Aaa of Cladophora were contained in the new material. 
a : 
antler-like branching; their upper portion is on the con- 
7 alt richly branched. Th rig fai et peda off on every side 
ly from the main-axis ; the longer are again ™ ~ 
ing branched, the shorter single. I have only observed cane 
S of the second grade, The terminal cells are scarcely attenuat 
and end j Pe he 
— OUter ches it ; na adi . Th ll-contents 
ee Tan is thin and not stratified. ©. CON Se. 
a Pear filled With vacuoles. The cells are somewhat thinner 10 sd 
"Portions of the thallus than in thg under portions ; the diame 
