38 
PENIUM, Bréb. 
P. Sioabevtollten; Raifs. Prof. Moebius says :—“ The cells of 
On this Reeistot ‘y have observed a form which is 56 p road and 
6 times as nS ; in other respects, however, it aif the usual 
tf eogadet ides 
: Farrar’s Creek, ata Ra oo 
Bee Botany Bulletin No. Vis 34.) 
P. sp. (n. sp.?) Prof. are says :—“ 1 have, unfortunately, 
only observed one specimen ; it is a very large form, which in shape 
P. digitus (Ehrb.), B The cells are spindle-shaped, and at the 
ends suddenly very ae attenuated, in the middle 105 thick; the 
sage oy is 546 » long. 
: Bu ig Sing 4 collection, November, 1892, Dr. Thos. Dis Bancroft. 
Gis X., Fig. 
TRIPLOCERAS, Bail. ad 
T. gracile, Bail, In isolated specimens. The specimen eae : 
is 17 ye thiek” and 430 » long, with 3 pointed ends, each end with 
feats The species has piseedy been mentioned.— Moebius 
: Port Curtis t, May and June, ee, Dr. Thos. L. Bancroft. 
(Bee Botany Bulletin No. VI, p- 44, and Fig. 3 6.) 
DOCIDIUM, Breb. F 
Frond yery elongated, straight, constricted at the middle; segments 
with an inflation at the base (rarely not so), often w ith others above 
or with whorls of knot-like projections ; ends abruptly trunca® 
Endochrome with a terminal rounded clear faery at each end, in whic 
are active granules.—Cooke’s British Desmids, 
nulatum, Grun. Smooth or sabi ‘pibnetats _ 
drical, al slightly attenuated near the ends; apices plage ery tag ee 
a crown of pearly teeth. Twelve times as long oad. | Diame of 
in ga 38 «4; near the end, 33 p.— Wolle, pelts ‘af the 'U.S.° 
mer., 
pe Moebius says: —“ Specimens again observed, and ager? 
most part adhering in the form of a series. Cells 540 p long; * fur- 
BRIER 20, at the end 33 » broad. In this species the cells gs 
wn from the 
cmc Banka and from North America; var. caldensis, Wolle, from 
Hab.: Port Curtis District, 
(Plate X., Figs. 1 aa a)" Dr. Thos. L. Bancroft. 
D ee ee Neg. 
cur 
note :—“‘ Frequent. Cells of fairly regular dimensions, 2: 
ore 
60 » long; membrane finely punctate; in each half-cell chromatoph 
own f uro 
with a ooh Sarin id. and North America. 
Port Curtis Dist 
Cue Fig. 11.) strict, Dr. Thos, L. ican 
us 
Bréb.), Reinsch. The following is Pet — : 
