Rii-Floi'ii|c';i', Gii^artitie.p, Gig.arMiiii. 221 



cuneato- aiit laiiceolato-lineares, siniplices aiit seni((l vd bis diclio- 

 tonias, ali(iuan(lo sul^palniatie, innno papillis niarginalibus in seg- 

 menta frondi conforniia excrosccntibus pinnatfB. Segnienta 2-5 cm. 

 lere lata. Papilhe a disco et margine in superiore frondis parte evo- 

 luta3 numerosissinia^ initio subulatoe, dumum cystocarpiis evolutis 

 niutatffi, in disco breves et cystocarpia singula ferentes, marginales 

 sensim in segmenta frondi conformia, linearia et demum lanceo- 

 lato-linearia evolutae, pinnas 2-5 cm. longas mentientes, fructibus 

 pluribus pinnata^. Color fere fuscescens. Substantia gelatinoso-car- 

 tilaginea aquam avidissime imbibens. A Gigartina volante (Ag.) ra- 

 mificationis norma iuii^rimis cystocarpiisque muticis dignoscitur. 

 52. Gigartina volans (Ag.) J. Ag. Icon. Algar. ined. edit. ir, t. 18, 434 

 Sp. Vi, p. 275, Epicr. p. 200, Sphwrococcus volans Ag. Icon.' 

 Algar. ined. t. 18, Sp. Alg. I, p. 26G, Mastocarpus volans Kuetz. 

 Sp. p. 734, Tab. Phyc. XVII, t. 48, Trido3a volans Grev. — Kronde 

 simpliciuscula, vage et parce pinnata, piunis ovatis ramenta e disco 

 emittentibus brevia, e margine longiora linearia apice subfurcata; 

 cystocarpiis papilheforniibus, in apicibus ramentoruni sitis. 



Hah. ad Caput Bona3 Spei Africa? australis (Chamisso). — Frons 

 spithamasa, plana, enervis, basi angustata et vix 4-8 tnillim. lata, 

 mox dihitatur et dividitur in segnient:i 3 vel 4, ovata, basi atte- 

 nuata, digitalia, 2,5 cm. vel ultra lata, parum crispa, obtusiuscula 

 vel interdum apice lissa, disco utrin.iue obsessa papillis erectis, 

 rigidis, 4-5 njillim. longis, plauiusculis, apice tamen ter-tiuscnlis' 

 rotundatis, obtusis; e margine einittens ramenta 1-2,5 cm. longa! 

 plana, 2,2 millim. lata, horizontalia, parallela, linearia vel leviter 

 cuneata, apice subfurcata. Color fusco-pnrpurascens. Substantia 

 cartilaginea, crassiuscula, tenax, algas exsiccat» cornea. Fide ico.ie 

 a cel. Ag. exhibita, hsec species habitum prjebet (excepto colore) 

 quasi Laminaricv cujus crassitiem et substantiam habet. 

 53. Glgariina runclnata Grun. Novara p. 71, J. Ag. Epicr. p. 200. 435 

 — Fronde latiore, mixime polymorpha, subsimplici, varie lobata 

 vel hinc inde bipiiinatiflda; cystocarpiis in ramulis e marglne e 

 disco pullulantibus sitis, solitaris aut aggregatis et ramuli apice 

 coronatis; soris tetrasporangiorum fronde immersis. 



Hab. ad S. Paulum in oceano Australi (Grunow). — Stipes 

 basi quasi teres, circiter 2,5 cm. longus, 2,2 millim. crassus, raro 

 smiplex, ssepius rainos laterales 2-4 conformes emittens in laminas 

 basi cuneatas, 4-8 cm. longas, 2-5 cm. latas, tetrasporangiferas 

 abeuntes. Laminse margine dupliciter dentata?. 



