44 
T. gracile, Bailey. Prof. Moebius gives the following note:— 
“ Very isolated, only ee in a few complete semi-cells. These were 
Zealand. 
Tig. $6: Nordst. fig. see reproduced. 
Hab.: Burpengary, Tho L. Baneroft. Ponds, Victoria Park, Brisbane, 
W. J. Byram. Found also in bite. India, and Kew Zealand. 
DISPHINCTIUM, Neg. 
i gives the following general description :—* Cells 
‘ 
De 
straight, cylindrical, ovate, or fusiform with truncate or round 
ends, the central constriction errs isially imperceptible or 
little depth; the semi-cells without basal inflation or longitudinal 
striae. Chromatophores parietal or axillary, one (or oh m ae 
semi-cell Containing in the centre a pyrenoid {rarel two). 
zygotes 
D. brit ndrus, (Lir.?) Neg.; Penium cy eae Bréb., 
Cooke’s Brit. Desm. Frond m minute, reddish, three or four times 4% 
a as broad, bybcrea not — at the middle, ends rounded: 
Hab.: Burpengary, Thos. L. Tae Also in Parcpe. 
PLEUROTENIUM, Neg. 
De Toni gives the following general tae -—** Cells siraigt 
Closterium. "Multiplication as in stir desmids.’ 
Se ee et Tae en 
the “dimensions : 
P. Ehrenbergii, A adchea Delp. This species was one of the most 
but t 
abundant observed ; the size is pretty variable, 
sais is with eon olan toad: 25-35 p broad, 180-540 p long. 
ng cell; 5b, empt cell ; e, zygospor 
British Feamide (Docidium Ehrenbergii. ) : 
urpengary, Fairfield, a t. 
Thompson Estate, Veukes ne ; and To aoe wot oe eh ise} th 
ownsville, W. J. 
North and South America, Siberia, Senegal, sh New Zealan eae 
4 nodosum, Lundell. ones nodosum, Bail. ) Cooke’ s Brit 
esmids. Frond stout, suture form ing a rim; segments three oF 
times as long as broad, "with four prominent inflated nodes, inclu 
the basal, which is somewhat the largest, and which are due © 
Ponds; 
ropes pes 
e. Cooke's 
