Confervoideffi, (Edogoniaceae, OSdogonium. 61 



Alg. U. S. p. 168, Wittr. Q^dog. aaieric. n. 9, Wolle Freshw. Alg. 

 U. S. p. 85, t. 84, f. 9. — Oogoniis plerumque singulis, globosis 

 (rarius subliexagonis), poro foecundatiouis in parte iuferiore oogonii 

 sito; oosporis globosis, oogonia non complentibus, exosporio lineis 

 elevatis, spiralibus, quattuor ornato; cellulis suft\iltoriis eadem 

 forma ac cellulis vegetativis ceteris; filis femineis in setam lon- 

 gam, hyalinam productis; nannandribus in cellulis suff^ultoriis se- 

 dentibus, stipite recto; antheridio exteriore bi- (vel tri-) cellulari; 

 diametro oosporarum circ. 50 [j.. 



Hab. in stagnis prope ((Philadelphia» in Pensylvannia (H. C. 

 Wood). 



78. CEdogonium Cleveanum Wittr. Dispos. (Ed. Suec. p. 129, Prodr. i36 

 Monogr. (Edog. p. 28, n. 61, Kirchn. Alg. Schles. p. 56, Cooke Brit. 

 Freshw. Alg. p. 164, t. 62, f. 1, (E. echmospermwn Pringsh. 

 Beitr. z. Morph. d. Alg. I, p. 70, t. 5, f. 7, non A. Br. — Gyn- 

 androsporum ; oogoniis singulis, subglobosis, poro inferiore aper- 

 tis; oosporis oogonia fere complentibus, globosis, echinis conicis, 

 spiraliter dispositis; androsporangiis 4-6-celIuIaribus; nannandribus 

 paullulum curvatis, in cellulis suffultoriis sedentibus; antheridio uni- 

 cellulari; crassit. cell. veget. 18-26 [.'.. altit. 3-7-plo majore; oogon. 

 52-60^59-63; oospor. (c. echin.) 49-57=^51-59; longit. echinor. 



4 a.; cell. androsp. 18-22^9-18; stip. naunandr. 10-11=^29-30; 

 cell. antherid. 8-8,5« 14-16. 



Hab. in Suecia, Germania, Gallia, Hibernia. — Var. arvense 

 Istv. Schaarschm. in Notarisia 1886, p. 242: echinis late conicis, 

 subrotundato-truncatis; diam. oogon. 67 a. ; diam. oosporarum 53- 

 57 u. ; crassit. cell. veget. 20 (/..; longit. cell. veget. 93 y.. In tur- 

 fosis prope (( Nameszto » Hungariae. 



2. Oosporse echinatse. 

 * Oosporse globoste. 



79. Etlogonium steilatum Wittr. Dispos. CEdog. Suec. p. 129, Prodr. 137 

 Monogr. CEdog. p. 27, n. 600, t. I, f. 15, Wolle Freshw. Alg. U. 



S. p. 85, t. 84, f. 1-2. — Gynandrosporum ; oogoniis singulis vel 

 2-3-continuis, oboviformi-globosis, poro superiore apertis ; oospo- 

 ris oogonia fere complentibus ; globosis, echinis conicis, spiraliter 

 dispositis, spiris fere septem ; androsporangiis 1-2-ceIIularibus; cel- 

 lula terminali gracili, subhyalina, apice obtuso; nannandribus rectis, 

 in cellulis suff^ultoriis sedentibus, antheridio bicellulari ; crassit. cell. 

 veget. 15-35 a. altit. 2V2-5-pIo majore; oogon. 51-61 ::: 58-70; 



