35 
Z. leios m, De Bary. Cooke's British Freshwater Algw, 82. 
' 2 e ate in gn loneth and breadth, or som metimes twice af toni 
Zygospore stakes or broadly oval, formed in one or two ¢ conjugating 
cells; membrane eee even. Sporiferous rote a little sucdein 
Size: Cells, 022 mm. diam.; zygospore, ‘023-03 m 
- Prof. Moebius’ ASAE is as follows—* Nea of “the filaments very 
symmetrical, 22-24 » thick, 1-14 times as long, rarely somewhat 
shorter than the diameter, slightly muted at the septa with two 
mgd eoeny- defined star-shaped chromatophores in each cell. Spores 
wig 94 4: a, portion of fertile thread x 400; 4, ¢, fertile cells with 
“ygospores x 400, after De Bary ; d, mature zygospore x 400, afte 
De Bary.—Cooke, l.c 
Hab. : Ditsengiry, Thos. L. Bancroft. Also in Europe and America. 
Z. tenuis simum, Grun. Prof. Moebius says :—“ This speci es is 
as ectinatum, (KAuefz.) Ag. Sterile cells 
12 times as long as 2 d, Zygospore Ste or broadly slips 
Cel ae ne formed in the canal of conjugation. Size 
ws 0 iam. (sometimes less) ; zygospore, ‘04 mm diam. 
~Cie 8 Bri Freshwater Algi. 
aller than in the typical f the foregoing alga should, 
a pical form, the foreg 
5 the more po citeood as - variation conspicua (Hass.), Kirehn., but 
: not s 
= ae 25; a, siGon of sterile threads x wets b, threads in 
2 emjuneti on x 200; ¢, zygospore x 400.—Cooke, 1. 
A South “i Thos. L. Bancroft. Also found in hea North and 
nium) ericetorum, (Avetz.) Hang. C ooke’s 
nth m ieogontn ies 98. Sterile cells 1} to 2 times as long as 
Zygospores subglobose or oblong ; sporoderm rather ee 
ze a. ells, “013 to ‘018 mm. diam. ; zygospore, “O13 x 
Mey: 
_ wr. Co oke, who retain s Zygogonium as a genus, says :— The 
a Page less than the eqhit ties of the endcchrome, varies con- 
Y in this species. In some specimens the filaments “are of 
