46 
in longitudinal and transverse Tows ; in the middle of the semi-cells 
about 18 longitudinal rows, and in each semi-cell about - 
transverse rows, can be distinguished. At the isthmus the membran 
ia smooth. The endochrome was not clearly distinguishable, yet the 
N 
I submitted a preparation of the Australian diem was so kind asto . 
raw my attention to its relations hip to the species named and the 
difference from this, on which account T take the liberty of naming the 
variety after him.” 
Hab. : Herpeugsty, Thos. L. Bancroft. 
Prof. Moebius then adds the following Latin description : "Var. 
a forma typica isthmo augustiore diversa, ita ut semi-cellule sub- 
globose, apice et basi applanate appareant ; cellulis 110-118 » 
-45 mw era Hab. i 
the narrower isthmus, so that the semi-cells appear subglobow 
flattened at the apex and base; cells 110- 118 p long, 60-65 p thie 
cor 40-45 p thick. 
: In Hiealiwiater Australia, Burpengary. 
COSMARIUM, Corda. 
Frond more or less constricted; segments U undivided oe 
rounded, rometimes slightly si nuated, or rarely slightl 
oe 
| 
somewhat extended and Gaanis at the ends, never n pe neither — 
provided with spines nor processes ; end view elliptic, and som 
each side with a lateral opposite inflation, or circular. —Cooke’s 
Desmids, 79. 
metin 
British 
large, on the back four small, Sa lvanees' the middle nae 
is surrounded by a ring of small papillee ; re ‘the pepe” the 
are arranged in two semi-circles; seen from above, 
elongated and cylindrical, with a central bulgixig on Voth ides , eels 
trom the side, the cells appear biscuit-shaped. Length of t 
26 p, breadth at the constriction 22 p, breadth of the ithmus 5 
Hitherto only known in North Ameri ex ‘e 
epee oe Waterhole, Victoria Park, Brisbane, Thos. L. Bancroft. 
. Meneghinii, Bréb. Cooke’s British Desmids, 93. Fol ee 
minute, rather longer than broad ; constriction linear; S€5 ents hs 
quadrate, cee dt the wides-and ends; smooth, end Mei: Mey 
en pe; diam., 14» (D. 1-34 penn 
(K.) ; diam., 20-22 » Ww). oh ad = : 
bh M. forma ? “The specimens observed differ from the eypictl 
ight et outline of the semi- -cells. “The a 
consequently exhibits not four but six sinus; in other respects 
Also in North 
