CDOGONIACE. 167 
°036--045 mm.; oospore ‘028-035 x ‘028-034 mm.; sperm. 
cell 01-015 x 006-009 mm. 
Kirch, Alg. Schles. p. 57; Rabh. Alg. iii. 848. Rabb. Alg. 
Eur. No. 790; Wittr. Mon. Gidog. p. 33, t. 1, fig. 16-17. 
Gidogonium Nordstedit, Wittr. Gidog. Nov. 6, t. 1, f. 7-8. 
Britain. 
Plate LXIII. jig. 2. CEdogonium Pringsheimii, with oogonia x 400. 
Gdogonium punctato-striatum. De Bary dog. t. 2, f. 15-16. 
Oogonia single, depressedly globose, manifestly splitting 
round (circumscissile) in the middle, opening by a pore in the 
fissure ; oospore depressedly globose, nearly filling the oogonia ; 
male plants a little slenderer than the female; spermogonia 3-7 
celled; spermatozoids single; membrane of the vegetative cells 
and of the oogonia spirally punctate; basal cell depressedly glo- 
bose; membrane vertically plicate. 
Size. Cells: fem. ‘018-022 mm. 2-6 times as long; cells : 
male ‘016-019 mm. 2-6 times as long; oogonia *048-:055 x 
‘038-048 mm. ; oospore ‘044-'051 x -035--043 mm.; sperm. 
cell -016-'018 x :006--01 mm. 
Barker. P., in Quart. Jour. Micr. Sci. 1871, p. 94; Rabh. 
Alg. iii. 354. Rabh. Alg. Sachs.214. Wittr. Mon. Cidog. p. 
34. Rabh. Alg. Eur. No. 2276. Kirch. Alg. Schles. p. 57. 
Treland. 
Distinguished by the cell wall being marked by spiral strize of a dotted 
character, finely and closely set; these seen in an empty cell, through 
and through, the upper and lower striz being nearly in focus simul- 
taneously produce a somewhat decussate appearance. 
Plate LXIII, fig. 3. Cidogonium punctato-striatum, with oogonium 
x 400. 
bb. Oospores ellipsoid or egg-shaped. 
Gdogonium Boscii (Le Clerc). Wittr. Lisp. Gidog. Suec. p. 136. 
Oogonia single, rarely twin, oblong-ellipsoid, opening by a 
pore above the middle; oospores ellipsoid, by no means filling 
the oogonia, longitudinally costate; male plants the same or 
nearly the thickness of the female; spermogonia 8-6 celled ; 
spermatozoids binate; terminal cell slender and somewhat 
hyaline. 
Size. Cells :014-02 mm. 4-6 times as long; oogonia 
“04-045 x ‘08-"1 mm. ; oospore :036-'04 x ‘06-065 mm.; sperm. 
cell :013-'014 x :006-:009 mm. 
Wittr. Mon. Cidog. p. 384. Rabh. Alg. Eur. iii. 357, Rabh, 
Alg. Eur. No, 2198, 2369. 
