415 



Fain. XVII. VAUCHEIUEAE. Char, ess. Tliallns viridis 

 unica ccllula simplici 1. ramosa constructus, vesiculaefor- 

 niis, capillaris 1. li I i Cm-mis. Perigonidia externa latcralia, 

 subspbacrica. Schizogonidia In ccllula tliall! paruin inu- 

 tata evoluta, mobilia. 



In Perigonidiis externis ("capsulis") Vauclioriae utriim pliira 

 formentur Schizogonidia, an Iiologonirlium ("spora") soiitarium., 

 parum liquet. In pcrigonitllis extcrnis Derbesiae fBryopsiilis 

 tenuissimae Moris) pliira evolvi Schizogonidia, observationibus 

 Ccl. Solieri (Annales des Scienc. nat. Ser. 5. Dot. toni. 7. tab. 

 9) jam notnin cst. Scliizogonidia in ipso tbnllo Bryopsidis 

 sii'busculae, veluti in ccllulis Confervae evolvi deinoustravit Ccl. 

 .1. Agardh. Sed longc pluribus observationibus opus est, quas 

 dabit postcritas. Genus Vaucberiae, cujus mil lain habcmus 

 speciem verc marinain, bic omittendum esse credo eo magis, 

 quod quac in aqua subsalsa invcniuntur species, eae sunt aquae 

 dulcis incolae verissimac. 



LXVII. BRYOPSIS Lamour. 



Tballus capillaris 1. filifonnis unica cellula denique ramosa 

 imbricatimque, dislichc 1. pinnatim ramulosa constructus. Peri- 

 gonidia cxtcrna latcralia. Scliizogonidia in cellula parum mu- 

 tata mobilia. 



1. BBVOPSIS PLUMOSA Huds. 



Tliailo decomposito-ramoso, rainis pafenti-borizontalibus, 

 ramulis simplicibus 1. ramellosis utrisque disticbc 1. imbrica- 

 tirn cgredientibus. 



. tballo decomposito-pinnato, pinnis subdistichis. 



Ulva plumosa Hittls. Ft. An(j[. p. S7I. (A.) 



Bryopsis Lyngbyei Ft. Dan. Li/nyb. Hydr. p. 7o. t. It). 



Bryopsis plumosa Ay, Sp. 1. p> 448. 



