ae 
F 
= ae 
‘ 
41 
EUASTRUM, Ehrb. 
E. verrucosum (Hhrb.), Ralf, forma. Cooke’ s British Desmids, 63. 
Frond somewhat larger than broad, rough all over with conic granules ; 
segments three-lobed, somewhat divergent, all ss lobes broad, cuneate 
with a very broad shallow external sinus. Empty frond inflated and 
verrucose ; semi-cell with one large sili aie and a smaller 
one on each side, two on end lobe. Size: ‘90x 90 pe (R. ), 100 x 100 » 
(D.) ; diam - et (W:). aritkead le 
the surface en iow n fro 
ove Greenland, and ‘Asieheain asics 
: Burpe af Ar eso March, 1893, Dr. Thos. L. Baneroft. 
(rs, X., Fig. 16 a, 3.) 
“y MICRASTERIAS (Ag.), Meyen. 
s ecemdentata, Negeli. Suborbicular, Leobemgw ong ore’ ; 
4 Aeells distinctly elie he or obscurely five-lobed; lateral lobes 
4 vid by a small obtuse-angled sinus into tnd lobelets having 
slightly _ produced and mucronate : » 83- POD pe 
, s of U.S. eee 126. This peice says, Negeli 
fives the diameter as 40 yw onte go subalpine forms at 5045 
ell the Sweden lage ce so at 5 
: Moebius be 8 :— The specimen eae has the following 
tag 5 td , 85 br aes isthmus 28» br oad, cells in the 
_ elonged into four sing] t 
gle teeth me onding to these. 
i ior” ell Wate on spindle- shaped a: tapering ends. knows 
rth America, Japan.’ 
ry Darling Downs, Dr. Thos. L. Bancroft. 
] g. 17.) 
tnd r auslator’ s 1 —This desmid : exceeding], Asap around Brisbane 
Tow, avila cage Hn Steuer lentifully in a ¢o obtained from Ross 
bur Ni crit by woud stant ners A. Pil. XXXYVIL., 
Sar shy dierent from the Australian form, which is in all respects 
