45 
‘§. sp. Prof. Moebius says:—‘ The filaments observed form little 
fakes amongst other alge, but are not in good preservation. The 
times as long. The sheaths are thick and lamellose, but colourless. 
The branches given off in pairs equal to the main filament. ince I can 
identify this alga with none of the species classified by Bornet and . 
Flahault, it is perhaps new.” 
ab.: Glasshouse Mountains, September, 1892, Dr. .Thos. L. Bancroft. - 
TOLYPOTHRIX, Kuetz. 
Trichomes spuriously branched, pseudo-branches spreading. 
Ramifications rarely geminate, oftener solitary, and originating at a 
wher inuity of ichome is interrupted b 
Tocysts; 0 r several heterocysts placed directly above eac 
branchlet.—Cooke’s British Freshwater Algz, 268. 
tenuis, Kuetz. Small cespitose tufts on water mosses, 
gelatinous, olive-brown; filaments sparsely branched; articulations 
_ about as long as broad, often indistinct; light eruginous or yellowish ; 
4 h very thin, colourless or yellowish ; heterocysts usually single, 
_ Spherical or somewhat longer than broad. Diameter of filaments, 
8-4 u.—Wolle’s Freshwater Alge of the U.S. of Amer., 265 
Prof. Moebius gives the following description “ Separate amongst 
other alge, Filaments 7 p thick; cells 6 p thick, 2-3 times as long ; 
_ Septa indistinct, contents coarsely granular. At the spots where 
 Manches are given off the sheath is sometimes inflated, as is also 
_ Mentioned by Bornet and Flahault ; here lie one or more heterocysts. 
“he latter haye a very varying length; they are 2-5 times as long as 
own from Hurope, North America, Bolivia, Australia 
Sic. ot bees se 
spell a Sh ais © 9 
(Berggren) .” 
Hab. : Glasshouse Mountains, Dr. Thos. L. Bancroft. 
(Plate XI, Fig. 9.) 
Set S05 Ns onan ere ie lk 
NOSTOC, Vauch. 
m as 
| : : : in-like layers 
4 f nting. A specimen which forms thick skin nee 
: “centimetre in size, of ott irregular shape, with entire or lobed 
‘Margins, 
* walnut ; lobes elongated and anastomosing, ®* een, a 
ming brownish. Trichomes flexuous, aggregat 5 eed 
, Spherical or spherical-compressed ; sheaths uncoloured, — 
: Heterocysts slightly oblong. Spores subglobose “a 
‘Spores ize: Joints, 35 fae eterocysts, ‘005- mm. diam. ; 
ae (in form intricatum) subglobose, ‘0065 x ‘009 
: Ooke l.c. gives the f 
ey ist Enteromorpha intestinalis, and even within the 
The plant is at first of an oliye-yellow, gradu 
