Eii-Florideee, Nemalieae, Helminthocladia. 



1. Species oceani Atlantici. 



1. Helminthocladia purpurea (Harv.) J Ag. Sp. II, p. 414, Epirr. p. 506, i45 

 Johnst. et Croall Brit. Sea Weeils I, p. 179, t. 62, Mesogloia pur- 

 purea Harv. in Hook. Br. Fl. II, p. 286, Nemalion purpureum 

 Chauv. Rech. p. 57, Harv. Man. p. 153, Phyc. Brit. tab. 161, Kuetz. 

 Sp. p. 613, Tab. Phyc. XVI, tab. 62, Dumontia Calvadosii La- 

 inour. Dict. d' hist. nat. V, p. 643, Duby Bot. Gall. p. 941, //«///- 

 menia Calvadosii Mont. Crypt. Fr. p. 3? [non Nemalion purpu- 

 reum \'AY.dalmaticum, (luod ad Calosiphoniam pertinet]. — Fronde 

 tereti, medio subinl^ata, utrinque attenuata, ramis elongatis confor- 

 mibus, simplicibus aut compositis, quociuoversum egredientibus 

 obsita. 



Hab. in oceano Atlantico ad littora arenosa Angline (Htidson, Har- 

 VEY, Griffithts, Wy.\tt, Holmes, Batters), Gallise (Chauvin, De la 

 Pylaie, Lloyd, Bornet, Crouan, Lamouroux), Helgolandi?e. — Callus 

 radicalis parvus, conoideus, cartilagineus; frondes filiformes vel sub- 

 cylindracese, e basi gracili sensim usque ad medium ampliatse, dein 

 iterum attenuatce, 2-3 dcm. et ultra alta^ parce divisas, quoquo- 

 versum ramos semel l)is divisos acutiusculos gcrentes. Substantia 

 mollissima, luln'ica, gelatinosa, ita ut specimina chartre arcte adha?- 

 reant. Color purpurascens, exsiccatione obscurior et sa^pe in l)run- 

 neum vergens. 



2. Heimintliocladla Hudsoni (Ag.) J. Ag. Sp. H, p. 413, Epicr. p. 407, i46 

 Born. Alg. de Schousboe p. 263, Mesogloia Hudsoni Ag. Syst. p. 



50 p. p. (excl. synon.), Rivularia divaricata Schousb. Alg. Sch. 

 n. 205, Cluvtophora dimricata Schousb. Mscr., Gliodorum diva- 

 ric(d'um Schousb. Icon. Ined. t. 198-199, Gloiophora puhescens 

 Schousb. mscr., Liagora viscida Schousb. Alg. Sch. n. 206 non 

 aliorum. — Fronde teretiuscula, ina^qualiter dilatata et contracta, 

 vage quoquoversum ramosa et ssepius dichotoina, ramis tenuiori- 

 bus, cylindraceis, subclavatis, basi lata axi primario insidentibus. 



Hab. in oceano Atlantico calidiore a littoribus Galli;;e prope 

 «Brest» (Crouan) et Anglia!(HoLMES, BATTERs)saItem usque ad Tin- 

 gin Africte borealis ^SciiousnoE, Bornet). — Frondes quoad inagni- 

 tudinem maxime ludentes, SLepius 7-10 cm. alta.'. Color in partibus 

 adultioribus fusccscens, in ramulis purpurascens, nitore nullo. Sub- 

 etantia eximie gelatinosa. 



