 —— oe 
“many: whorls of knot-like eg tt or large tubercles ; ends entire, 
end view crenate. Size: 0 bs sa 395 mm, x 48-54 y ; apex, 30-39 #; diam., 
_ 45-55 » in centre (W.).—C be 
Fig. 38 bis. : a, living alls 4, empty cell.—Cooke, Le. 
Hab. : Still water, Vietorin Park, W. J. Byram. Also in Treland, Sweden, and 
the United States of Amer : 
P. ovum vum, Nordst. Sylloge Algarum, De Toni. (Docidiwm ocatum, 
: Rect Desm. Brasil, p 205, tab. 3, £. 37 .) Frond very stout, 320- 
harrow, 76-81 4 broad ; margin a little prominent; semi-cells ovate, 
apices truncate, crowned by 6 obtuse (or from a vertical view 10-12), 
membrane punctate, colourless. 
Fig. ip a 8,: Copied from Otto Nordst., Le. 
Hab, : water, Victoria Park, bebe W. J. Byram, Also in New 
Zealand, South Mee Brazil, and South Ameri 
PLEUROTENIOPSIS, Lund. 
ni's’ general description is as follows :—‘‘ Cells shortly’ 
qlindrical or globose, more or less deeply constricted in the middle 
and then etna into two semi-cells, as if om two gece 
3 many ‘pyrenoids. eee on by, ed oe ve 
abdirisiono of the cells. aciacion by zygot 
. P turgida, (Bréb. ag Calocylindrusturgid: rch., in Cooke’s 
| = Desm., 127. ) is a fate, in feat: view oon I gid rather 
fitter 28 ar as rg beth ; constriction a shallow sinus; seg- 
4 pears somewhat tapering, broadly rounded ; end view circular ; empty 
3 punctate. Size: Length, 187-216 es diam., 72°82 p (D.) : 
Hm 100 4 (K). 
a stricted Ssor Moebius says :—‘“ The cells are elliptical, slightly con- 
: ite th in the middle, truncate at the ends, Sue when seen from 
. Pee b high Bpewive with four pyrenoids in (un Soar resembles 
“put isshorte in proportion ane of smaller dimensions. Disphinctium 
em .b ae) — (Nordst.). De Toni has the same cell- 
hving frond; 8, empty ” frond: e, end vie 
=: IR Burpe ngary, Thos. L. Bancroft. Victoria Park, Brisbane ; and Towns- 
Byram. ‘Also found in sme Japan, and New Zealand. 
in the more considerable central constriction. 
fed e208 this, the semi-cells appeared almost spherical with 
poles, he membrane forms prominences in the shape nged 
papille abutting on each other; these _— arrange 
