Eu-Floriilese, Crouaniete, Antithauinion. L401 



thamnion macropterum Menegh. in Kuetz. Sp. pag. 048, J. Ag. 

 Sp. II, p. 30, Callithamnion Bebbii Reinsch Contrib. (1875) p. 47, 

 t. XXVIII, Callithamnion abietinum Reinsch Contrib. p.ag. 48, 

 t. XXIX, Pterothaninion Plumula Naeg. Pbysiol. Unters. I, p. 54, 

 Jterthold Vertheil. Alg. Neap. p. 516, Pterothamnion ? polyacan- 

 thum Naeg. Ceram. ( 1 801) p. 112, Callithamnion semipennatum 

 et Callithamnion plumosum Schoush. mscr., Callithamnion re- 

 curoatum Schousb. Icon. ined. tah. 388, Alg. n. 236 sec. Bornet, 

 Gallithamnion sp. Reinsch Contrib. pag. 46, tab. XXIV, 2. — 

 Roseum, rigidulum; frondibus subdichotome vageque ramosis, ad 

 articulos ramelliferis, ramellis oppositis aut verticillatis tetrasti- 

 cliis, refractis, pinnulatis, pinnulis numerosis, ramosis, secundis spi- 

 nescentibus, articulis diametro 2-3-plo longioribus, terminalibus 

 subaequalibus; cystocarpiis magnis, plerumque 2-4-aggregatis, ad 

 ramulos superiores evolutis, pinnulis cinctis; tetrasporangiis elli- 

 pticis vel globosis, majusculis, numerosis, loco pinnularum inferio- 

 rum superioris frondis, sessilibus, rarius pedicellatis, transverse 

 aut cruciatim divisis; antheridiis pedicello ssepius furcato fultis, 

 locum tetrasporangiorum occupantibus, thyrsoideis. 



Hab. in mari Adriatico ad Venetias regionesque vicinas (Za- 

 nardini, Titius, De Toni, Levi), ad «Ancona» (Ardissone), Ter- 

 geste (C. Agardh, Biasoletto) et passim per littus Istriae et Dal- 

 matise (Hauck, Meneghini, Zanardini); in mari Ligustico ad littus 

 Jtalke (Strafforello, Ardissone, Dufour) et Galloprovincia? (Le- 

 nohmand, De Fontenay) ; in mari Tyrrheno ad «Livorno» (Cori- 

 naldi) et « Spezia » (Ardissone); in sinu Neapolitano (Pedicino, 

 Berthold); in mari Mediterraneo inferiori prope « Alger » Afric;e 

 (Roussel et Deshayes); in oceano Atlantico a Tingin Africse bo- 

 realis (Schousboe) usque ad littora Lusitanise (Welwitsch), Hi- 

 spani;e (Colmeiro), Galli* (Bonnematson, Le Jolis, Debray, Fla- 

 hault, Brebisson, Lenormand), Anglia3 (Dillwyn, Harvey), Scan- 

 diuavise (Areschoug, J. Agardh), Daniae (Lyngbye), insulae Hel- 

 golandiae (Wollny); in mari Baltico (S. Ackermerk); in eodem 

 oceano Atlantico ad oras Americse borealis ( Farlow, Collins) 

 etaustralis ad Caput « Horn » (Hooker) ; in oceano Pacifico ad 

 oras Novae Zelandia3 (Lyall), Novae Hollandia^ et Tasmaniae (Har- 

 vey), si revera eadem. — Frons 4-10 cm. longa, ramosissima, ramis 

 patentibus vagis, terminalibus sa^pe trichotomis, a basi articulata 

 et pinnata. I J inna3 2 opposit;e aut 4 verticillat;e, tetrastichn', paulo 

 infra apicem superiorem articuli egredientes, inferiores patentissi- 



