Aes 
fillets, interrupted only by the central transverse pale band with 4 
single longitudinal series of large granules and a rounded clear space 
close to the ends, in which are active granules; zygospore globose, 
smooth. Size: Diam., 40-44 (W.); diam., 40-44 »; zygospore, 
46-56 i (K.). ; 
“The form found most nearly approaches this species. It is, how- 
ever, ely thinner (only 30 » broad as compared with 40-44 py, 
ng).” ebius. 
Fig. 84: a, living frond; 4, empty fronds.—Cooke, L.c. 
Hab,: Burpengary, Thos. L. Baneroft. Also found in Europe, North 
America, Burma, and Brazil. 
TETMEMORUS, Ralfs. 
2) 
a 
T. Brebissonii, Ral/s. Cooke’s British Desmids, 48. Frond in 
front view with parallel sides, in lateral view fusiform ; ends without 
any projecting processes ; puncta in longitudinal lines. Size: Diam. 
0» (W.); diam., 17-30 » (K.) ; length, 194 »; diam., 28 p (D.). 
T.B.,var. attenuata, Vordst. Prof. Moebius says:—‘‘ The cells in. 
this form seen from the front (where the incision is visible at the end) 
are attenuated towards the ends, whilst in the ty pical form they are 
| 4ndrical. The dimensions (22-24 ». broad, 14-17 p at the end, 110- 
140 long) are somewhat smaller than those found by ‘N ordstedt. 
This variety is only known in New Zealand, whilst the typical species 
a ” 
2. 3B, var. tenuissima, Mocbius (n. var.). Prof. Moebius 
Temarks:—“ Ag a i i 
Meer ee 
have a sharp constriction in the middle, and are at the widest part 
“nly 12-14 p thick; the semi-cells approaching a cylindrical form, but 
somewh ends n 
dais: et 
SE Sr = eet 
: What drawn in towards the end; the are truncate with 
_ ‘Souspicuous incision ; cells 128 long ; the membrane beset, as In the 
he ay ith fine puncta arranged in longitudinal rows. 
Hab, : Burpengary, Thos, L. Bancroft. 
TRIPLOCERAS, Bailey. 
“ey the general characteristics of this genus are given by De Toni : 
. Bylloge), as follows :—‘ Cellule sectae; yall clongat ; apres 
| considerat serrate, apicibus trilobis, lobis bidentatis.” (Cells straig Ne 
apices ably elongated, serrated with numerous protuberances, 
aS three-lobed, the lobes bidentate.) u 
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