158 NEMATOPHYCES. 
larger and elliptic oogonium; aperture of the oogonium very 
high up, being quite close to the annular strie of the caps. 
Cedogonium Pringsheimianum, Archer, in Quart. Journ. 
Mier. Sci., 1868, pp. 295. 
Treland. 
There being already a species bearing the name of Cidogonium 
Pringsheimii, which had priority, it became necessary to alter Mr. 
Archer’s specific name. We have not seen the species, and hence are 
unable to furnish a figure. Unfortunately no measurements are given 
with the above very brief description, which is a doubtful economy of 
space. It is the only monecious species with striate elliptical 
oospores. 
Section 11. Dicecious species. 
A. Dwarf males unicellular. 
a. Oogonia furnished with verticellate median processes. 
CGdogonium platygynum. WJWittr. Edog. Nov. p. 1. 
Gynandrosporous. Oogonia single (very rarely binate), de- 
pressedly obverse egg-shaped, median processes 7-12, rounded ; 
oogonia cut round (circumscissile) below the middle, opening by 
a pore seated in the fissure, vertical view ‘orbicular, margin 
sinuate, with 7-12 (usually 8) depressions; oospores rather de- 
pressedly globose, nearly filling the oogonium, androsporangia 
1-3 celled; terminal cell obtuse. Dwarf males obverse egg- 
shaped, small, seated on the oogonia. 
Size. Cells -006-01 mm., from 2-5 times as long; oogonia 
021-03 x °016--024 mm. ; oospore ‘017-024 x -015-:02 mm. ; 
androsp. cell -006--008 x ‘007--008 mm.; dwarf males 
*0045-005 x -0085-°0095 mm. 
Wittr. Mon. Gidog. p. 17, t. 1, f. 5-9. Kirch. Alg. Schles. 
p. 53. 
Treland. 
Plate LLX. fig. 5. Cidogonium platygynum, with oogonium ; a, trans- 
verse section of oospore x 400. 
b. Oogonia destitute of median processes, 
a Oospores globose or subglobose. 
Gdogonium Rothii. (Le Clerc.) Prings. Beitr. 69, t.5, f. 4. 
Gynandrosporous. Oogonia single, or 2-6 continuous, glo- 
bose, or rather depressedly globose, opening with a pore at the 
middle.. Oospores rather depressedly globose, almost filling the 
oogonia. Androsporangia 2-4 celled, subhypogynous; dwarf 
males obversely egg-shaped, seated on the oogonia. 
Size. Cells -006-008 mm., 3-8 times as long; oogonia 
02-021 x ‘016+'019 mm. 
