52 Coalci-voidese, QiLlogouiacciO, (Edogoiiiuiu. 



C. Species nainKUidribas bi-pluri-colluhiribu.s (autlicridio extcriore) donatte. 

 1. Oosporoe leves vel subtilissimo crenulatte. 

 * Oosporse globosix; vel subglobosse. 



56. OEdogonium flavescens (Hass.) Kuetz. Sp. pag. 370, n. 55, Wittr. m 

 Prodr. Moiiogr. (Edog. p. 21, n. 45, t. I, L 12-14, Dispos. O^dog. 

 Siiec. p. 127, Wolle Fresliw. Alg. U. S. p. 78, t. 78, f. 1-2, Cooke 

 lirit. Freshw. Alg. pag. 160, t. 60, f. 2 Vesicul/fera /lavescens 

 Hass. Hist. of Brit. Freshw. Alg. p. 206, t. 53, f. 9? — Idioaii- 

 drosporura; oogoriiis singulis, oboviformi-globosis (interdum subhe- 

 xagono-globosis), poro paullum supra medium sito apertis; oosporis 

 globosis, oogonia non plane complentibus (interdum subhexagono- 

 globosis, oogonia complentibus); androsporangiis 1-9-ceIlularibus; 

 nannandribus paullulum curvatis, in cellulis suffultoriis sedentibus ; 

 antheridio uni- (vel bi-?) cellulari; crassit. cell. veget. 18-21 a. 

 altit. 4Vo-6-plo majore; oogon. 49-52 ^ 51-60; oospor. 45-49 ^ 45-49; 

 cell. androsp. 17-20^8-18; stip. nannandr. 11-12*^39-45; cell. 

 autherid. 9-10^15-20. 



Hab. in Suecia (Wittrock), Britannia (Hassall) et Minnesota 

 America^ borealis (Wolle). 



57. Cdogonium multisporum Wood Prodr. of Freshw. Alg. of East n.-, 

 N. Amer. p. 141, Wittr. ffidog. Americ. n. 7, WoIIe Fresliw. Alg. U. 



S. p. 78, t. 80, f. 6-7. — Oogoniis singulis vel binis vel ternis, globo- 

 sis; poro fcecundationis in parte superiore oogonii sito; oosporis 

 oogonia explentibus, exosporio levi ; cellulis sulfultoriis forma eadem 

 ac cellulis vegetativis ceteris; nannandribus in partibus quibuscum- 

 que plantae foemineae sedentibus, stipite curvato, crassit. cell. ve- 

 get. 12-15 ij.. altit. 2-3-plo majore; oogon. 45-50 « 45-50; oospor. 

 42-47^42-47; cell. antherid. 11-13 ::= 40-50. 



Ilab. in stagnis in Pensylvannia pr. a Philadelphia» (Prof. II. 

 C. Woon). 



58. (Edogonium irregulare Wittr. Dispos. GKd. Suec. p. 128, Prodr. n,-, 

 Monogr. CFdog. p. 22, n. 46, Wollo Freshw. Alg. U. S. p. 79, 



t. 78, f. 4-5. — (Dogoniis singulis, globosis, poro superiore apertis; 

 oosporis oogonia complentibus ; nannandribus rectis, prope oogonia 

 vel in his sedentibus, antheridio 2-1-celIuIari ; crassit. cell. veget. 

 16-20 '/. altit. ^Vs-^-pIo majore; oogon. 37-45 :i 36-43 ; oospor. 

 3(5-40::; 34-38; stip." nannandr. 12-15^20-24; cell. antherid. 10-12 



:::6-8. 



