51 
however, this species has hitherto only been observed in fresh water, © 
the determination is not altogether certain. WM. paludosus is known 
from Europe.” 
Hab.: Moreton Bay, amongst Catenella, Opuntia, and other Alge. 
M. tenerrimus, Gom. Gom. Monogr., p. 93. Prof. Askenasy 
remarks:—‘‘ The diameter of the filaments amounts to 1-2 p, the 
length of the cells double as much. Known from Europe and America. 
Hab.: From the same habitat as the foregoing, amongst larger Algw and sand. 
HETEROCYSTE, Born. et Flah. 
RIVULARIACEA, Rabenh. 
CALOTHRIX, Ag. 
C. scopulorum, 4g. Prof. Askenasy gives the following note :— 
‘This alga is universallyj distributed. Amongst the same Alge was 
found a species of Anabaena, which, by reason of the absence of spores, 
could not be more accurately determined.” 
CHLOROPHYCEZ. 
 CONFERVOIDEA, Ag. 
ENTEROMORPHA, Link. 
~=«&. slathrata, Ag. Generally distributed.—Askenasy. 
ab.: Moreton Bay and Deception Bay. 
CLADOPHORA, Kiitz. . 
C. fertilis, H. Aske. (n. sp.) This being a new ct Prof 
. ‘ A | p 
oppositis vel ad 3 vel 4 verticillatis ; plures rami repetito ramosl, 
fasciculosi, breviores; pauci filo primario conformes; omnes angulo 
acuto exeuntes. Cellule apicales et illis proxima 100-150 p» longe, 
diametro 10-15 1; cellule adulte 400-600 p longw, diametro 85 ». 
Omnes cellule juniores zoosporas gerentes, 20 ad 50 in una cellula, 
oe €x orificio parvo prope dissepimentum — 
(Primary filaments as much as 10 em: long, pliable 
Pat atis with only a few side-axes of the same § 
—qatches are usually richly branched, but remain § 
haped. The main-axis also terminates in a similar tuft. 
: branch is found on each’ 
* 
3 £ 
