— 
Eu-Floridesm, Delesserie:, Schizoneura. 725 
rioris peractà, nunc pluribus eellularum seriebus a margine ad 
marginem duetis constat, cellulis serierum invicem alternantibus, 
seriebus ipsis extrorsum cellulis numerosis cubicis obtectis, nunc 
diverso modo constructa, ut docet ill. J. Agardh Sp. IIT, 3, p. 164 
et seqq. 
I. Costa alterne ramosa. 
Schizoneura subcostata J. Ag. Sp. III, 5 (1898), p. 168 (nomen), 
Delesseria, subcostata J. eg. Sp. IL, p. 681, Epier. p. 480, Florid. 
Morphol. t. 26, f. 8-11, Born. Alg. de Schousboe p. 296, Nitophyl- 
lum. subcostatum J. Ag. Symb. p. 9, Cryptopleura  subcostata 
Kuetz. Sp. p. 872, Areolaria pusilla Schousb. mser., Delesseria, 
pusilla, Schousb. Icon. ined. t. 504, Descript. p. 251, Alg. Schousb. 
p. 417. — Fronde simpliciuscula aut dichotomo-pinnatifida, seg- 
mentis erectiusculis basi confluentibus lanceolato-oblongis; costa 
inferne paree dichotoma, ramis alternis brevioribus, supra medium 
evanescente; eystocarpiis sph:ricis, in pagina frondis utroque la- 
lere costs seriatis; soris rotundatis, per frondis partem superio- 
rem sparsis. 
Hab. in Lomentaria articulata aliisque Algis ad Tingin 
Afrieze borealis (ScuouspoE). — Frondes sepe simplices, 19-14 mil- 
lim. long:e, lanceolato-oblongs, nune 2-9 em. longs, circumsceriptio- 
ne magis cuneat:e et apice furcatze, pluries dichotom:ie aut subpin- 
natifiddj», segmentis oblongis basi confluentibus. Costa frondem per- 
currit inferne valida, supra medium sensim tenuior et evanescens; 
aecuratius inspecta, costa dichotome-divisa apparet, ramis cost: 
nunc in fronde fere indivisa expansis, nunc, divisione seemento- 
rum longius provecta, rami in singulis segmentis singuli. Rami ce- 
"terum nunc :quales sunt, nunc costa principalis frondem percurrit, 
ramos alterne emittens breviores. Cystocarpia utrinque seriata, ma- 
gis margini quam cost:? adproximata. Sori rotundati, diametro 
1 mm. fere ::quantes aut paullulum excedentes, seriebus pluribus 
utroque latere dispositi aut potius omnino sparsi, procipue in su- 
periore plantz:» parte obvenientes. Specimina exsiecatione chartae 
arcte adhzrent. 
Schizoneura dichotoma (H. et H.) J. Ag. Sp. III, 3. (1898), p. 168 
(nomen), Delesseria dichotoma Hook. et Harv. Orypt. antarct. p. 72,: 
t 71, fig. 2; Harv. Ner. Austr. p. 115, Tab. Phye: XVI, t. 94, f. c-f, 
Hypoglosswm.  dichotomwum  Kuetz. Sp. Alg. p. 877. — Fronde di- 
chotomo-pinnatifida, segmentis patentibus basi demum stipitatis, 
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