1G94 Eu-Florldese, Squamarieae, Peyssonnelia. 



disposita, nucleum elongato-oblonguni moniliformein simplicem aut 

 parce ramosum constituentia. Carposporaj 2-plurim;eve seriat;e in 

 articulis singulis singuloe membran;l hyalina articuli cinct;e de- 

 presso-discoidese aut oblongo-rotundatse. Tetrasporangia (in aliis 

 individuis) eodem modo inter paranemata nemathecii sita, pedicello 

 l)revi affixa, oblonga, magna, cruciatim divisa. Paranemata a cel- 

 lulis superficialibus singulis singnla proveniunt, simplicia aut parce 

 dichotoma. J. Ag. loc. cit. '). 



1. Peyssonnelia Harveyana Crouan in J. Ag. Sp. II, p. 501, Epicr. 2fi''3 

 p. 884, Crouan Fl. Finist. p. 148, t. 10, gen. 120. — Fronde cru- 

 stacea in orbem expansa, tota arctissime adn;ita, cellulis strati de- 

 cumbentis a pagina observatis in lineas evidentes conjunctis, dia- 

 metro parum longioribus, filis strati ascendentis pauci-articuhitis, 

 articulis diametro sesqui-duplo longioribus; cystocarpiorum nucleo 

 oblongo simplici, carposporas rotundatas 2 4 fovente. 



//«&. in frondibus Cystoseirre fibrosae et in Lithotha- 

 mniis in oceano Atlantico prim;i vice lecta ;i,d littus Galli;i3 pr. 

 « Brest » (Crouan). — Frons 2-2,5 cm. diam. ;i3quans, calce carbo- 

 nic;i leviter incrustata, tota inferiore superficie arctissime adnata. 

 Fila verticalia, quae frondem sterilem efficiunt, articulis constant 

 diametro sesqui-duplo longioribus, a sectione verticali observatis 

 rectangularibus, sectione horizontali 5-6-hedris ; peripheriam versus 

 in fila excurrunt elongata, cellulis regulariter seriatis rectangula- 

 ribus (ut apparent) constituta. Verrucse fructus oblongae, nullo or- 

 dine supra frondem sparsoe. Paranemata et tetrasporangiorum et cy- 

 stocarpiorum simplicia, articulis diametro duplo-triplo longioribus 

 constantia. Tetrasporangia obovata, crassa, cruciatim divis;x, para- 

 nematibus fere duplo brevioni. Cystocarpia carposporis nunc 3 vel 

 4, saepissime duabus constituta, oblonga, pedicello l)revi hj^alino 

 affixa. Carpospor;T3 intra membranam hyalinam laxius ambientem 

 articuli singuhie in filo transmutato, ([uo constituitur cystoc:irpiiim, 

 plures et una supra alteram seriata) nunc 3-4 pmesentibus latera- 

 liter alterne plus minus prominentes maturae licet intra membni- 

 nam cohibitae rotundatcC. An Cruoriel/cu sp., fiit forsan Peyssoimel- 

 lia adriatica Hauck?). Specimina Peyssonnelim Haroeyamu ligu- 



') Nomen generls varlo modo ab auctorlinis .scriptum, li. e. PeyftsonneUia, 

 Peyssonelia, PeyssoneUia, Peysonnelia ; aptius PeyssonneUa usuri)andum e.st. 



t 



