48 



Veit Brecher Wittrock, 



1). Species cellula basali (stipite) nannandrium longiore 

 quam spermogonio. 



12. B. gigantea P rings h. 



Beitr. z. Morph. d. Alg. I, p. 71, t. 6, f. 1. 

 B. idioandrospora?; oogoniis subdepresse obcordiformi-globosis, sub 

 setis termiualibus, raro sub cellulis vegetativis sitis; dissepiraento cellularum 

 suffultoriarum mediano vel paullum supra medium posito; episporio verru- 

 coso; nannandribus paullo longioribus quara oogoniis, in his sedentibus, 

 stipite duplo fere longiore quam spermogonio, arcuato; 



crassit. cell, veget. 24 — 27 p x ), altit. 2 — 3plo major; 

 oogon. 62 — 66 „ ,, 51 — 58 p v )\ 



„ stip.nannandr.il — 12 ,, „ 40 — 45 „ ; 

 „ cell, spermog. 13 — 14 ,. „ 20 — 22 „ . 

 Hab. in Suecia, Germania (sec. cel. Pringsheim), Gallia. 



13. B. valida Wittr. 



Gotl. o. 01. SStv. Alg. p. 17, t. 1, f. 1 



B. oogoniis depresso-globosis vel depresse obcordiformi-globosis, sub 

 setis termiualibus sitis; dissepimento cellularum suffultoriarum fere mediano 

 (ssepe paullum infra medium posito); episporio granulato; androsporangiis 

 sparsis, 3cellularibus; nannandribus paullo brevioribus quam oogoniis, in his 

 sedentibus, stipite paullulo longiore quam spermogonio, curvato; 



crassit. cell, veget. 25 — 27 ^, altit. 2 — 3V 2 plo major; 

 „ ., androsp. 18—19 „ „ 10 — 12 

 „ oogon. 59 — 66 „ ., 48 — 56 ,, ; 



stip. nannandr. 9 1 /,— I'O „ „ 23 — 29 „; 

 cell, spermog. 11 — 11% „ ,, 21 — 22 „. 

 Hab. in Suecia. 



C. Species nannandribus bicell ul aribu s , spermogonio 

 exterior e. 



14. B. crassa Pringsh. 



Beitr. z. Morph. d. Alg. I, p. 72, t. 6, f. 2. 

 B. oogoniis subdepresso-globosis, sub setis termiualibus (rarissime 

 sub cellulis vegetativis) sitis; dissepimento cellularum suffultoriarum mediano 

 vel paullum supra medium posito; episporio non verrucoso; androsporangiis 



') Mensurae a cel. Pringsheim 1. c. editse paullo majores sunt. 



