1678 Eu-Floi-idese, Rhizophyllidaeeae, Rhizophj4lis. 



gis, superficiem versus seiisiin minoriltus, cortii^alibus angulatis. 

 Cystoearpia sponglolis nemathecioideis hemispha^ricis immersa 

 plura, intra periderma hyalinum carposporas plurimas rotundatas 

 foventia. Tetrasporangia in verrucis nematheciosis planis collocta. 

 irregulariter cruciatim (aut zonatim) divisa, Antheridia {sec. Hauck) 

 in nematheciis verrucoso-planis e transformatione articulorum fi- 

 lorum (luorumdam evoluta. 



Ohs. Frondes decumbentes et supra alias Algas expansas, pulchre 

 coccineae, membranaceae, sublineares dentatcie vel crenulata; atque 

 dentium evolutione subpinnatim ramosge, ex ancipite plana^ et 

 immerse subcostatie. Frondis pagina inferior rhizinis validis s;epe 

 plurimis instructa est, quarum ope ipsa frons PeijRsonnelio' adha)- 

 ret. Stratum corticale inferioris pagin;e cellulis depressis ac secus 

 paginam elongatis constat. Celhilae frondis omnes fere conformes, 

 rotundato-angulaUe, peripheric;e tantum minores. SpongiobTe nem;i- 

 thecioidea? in subcosta seriatie, semimillimetrum crass^e, oh cysto- 

 carpia inclusa obscurius coloratte; fila articulata dichotoma, endo- 

 chromatibus purpureis insignia, a puncto centrali basilarique enata, 

 quoquoversum irradiantia, apice fastigiata moniliformia. Inter h;ec 

 fila cystocarpia suspensa sunt sphairica vel oblonga membrana pel- 

 lucida cincta. Carposporse oblongo-rotundatse. Tetnisporangia nema 

 theciformi-aggregata, irregulariter cruciatim divisa (aut revera 

 zonatim divisa, ut habet Zanardini). 



1. Rhizophyllis Squamariae Kuetz. Phyc. germ. p. 334, Sp p. 877, m^ 

 Tab. Pliyc. XVI, t. 8, Ardiss. Phyc. Medit. I, p. 224, RhizophylliH 

 (lentata Mont. Fl. d'Alger. p. (53, t. IT), f. 2, J. Ag. Sp. II, p. 222, 

 Epicr. p. 352, Zanard. Icon. phyc. Adriat. t. 87, Hauclv Meeresalgen 

 p. 37, f. 8, Detesseria alata var. clentata Mont. Crypt. Alg. n. 76, 

 Rhodomenia perreptans J. Ag. Symb. p. 13, Wormskjotdia 

 SquamaricE Menegh. Lett. al Corinaldi n. 8, Zanard. Lett. II, 

 p. 20 et Syn. Alg. Adr. p. 92, Rhodymenia Scjiiamaricv De Not 

 Alg. Lig. p. 22, Chcetophora pulctietla Schousb. Icon. ined. t. 423, 

 Alg. n. 313 sec. Bornet. — Fronde ex ancipiti plana, subcostata, 

 orbiculariter expansa, subpinnato-dichotoma, segmentis linearibus 

 dentato-lobulatis obtusis. 



Hab. in mari Mediterraneo, ad frondes Peysso n neli;e Squa- 

 marioe, nunc a fulcro soluta; ad Tingin Afric;e bore;xlis (Scnou- 

 sboe). — Frons plerumque 1-3 cm. longa, in orbem a puncto cen- 

 trali radi;ins, supra paginam Peyssomietic^' expansa, et sjHpius ra- 



I 



