144 Eu-Florideae, Gelidieie, Geli lium. 



Conspectus generum. 



A. Frons (leoi-snni liaiid st.ipiUtorinis, iioc; disciilos snhiinbricatos p-erens. 



I. Frons tercs aut de|)laiiato-anceiiS, lateraliter plenimniie pinnatim ranKJSn. 



(^e^/diM»j Lamour. — Cystocarpia bilocularia (rarius unilocularia). 



II. Frons ancipiti-de[)laiiata, costa mediana indistincta, repetite pinnatim ra- 



mosa. 

 Pterocladia J. Ag. — Cystocarpia uniiocularia. 



III. Frons linearis plana. 



* Frons costa distincta percursa. 

 Siihria J. A,^-. — Frons simpliciuscula parceve lateraliter romosa, prseser- 



tim ad margincm sparse, ad costam dense ciliata. 

 Ptilnphora Kuetz. — Frons i^innatim ramos;i, inaruinc denticulata et un- 



dulnta. 

 ** Frons costa destituta. 

 Porphyroglossnm Kuetz. — Frons simplex parceve l.-iteraliter ramosa, se- 



cus lineam medianam una aut alterutra pagina pinnnlis anjiuste linea- 



ribus dense obsita. 

 Acropeltis Mont. — Frons simplex aut e mar^jine vel ex apice pliis miiius 



prolifera, marg-iiie denticnlata. 



B. Froiis deorsum stipitiformis. 



Acantliopcltis Okam. — Frons superne crnssiusculn, cylindracea, e discis 

 dense seriatis bre\iterque et subexcentrice petiolatis constituta. 



Spencerella Darbish. tctrasporangia triangule divisa pneb^-ns, ad Chlidieas 

 liaud pertinet. 



GELIOIUM Lamour. [1813] Ess. p. 41, emend. {Etym. a gelu, iinde ge- 

 latina, etsi frondes non sint gelatinosse), Mont. Fl. d'Alger. p. 104 

 (descriptio fructus incorrecta), Naeg. Neuer. Algensyst., Haufe 

 Beitr. Kenntn. Anat. einiger Florideen (Gorlitz 1879), p. 216, t. VII, 

 f. 33-3G, J. Ag. Alg. med. p. 101, Sp. II, p. 466, Epicr. p. 546, 

 ydimitz et Haupttl. in Engl. & Prantl Natiirl. Pflanzenfam. 142, 

 p. 347, Cornea Stacldi. [1809] Tent. nier. crypt. Clavatula Stackh. 

 [1809] Tent. mar. crypt., Acrocarpus Kuetz. [1843] Pliyc. gener. 

 p. 405, Sp. p. 761, Echinocaulon Kuetz. [1843] Phyc. gener. p. 405, 

 Sp. p. 762, Helminthochorti, Spha^rococci, Ficci, Chondrice, Teke- 

 denmtis sp. auct. nonnull. — Frons teres aut ancipiti-plana, pin- 

 natim decomposita, tril)us fere stratis contexta, interiore fibris elon- 

 gatis longituiliiiiililms s:i'pius densissime intertexiis constante, ex- 

 teriore cellulis rotundatis, intoriorilms nunc majoribus, corticalibus 

 in fila brevissima moniliformia subcoiijunctis. Cystocarpia infra api- 

 pes pinnarum in utra(^ue pagina prominentia, typicc bilocularia, ad 



