454 Phaeozoosporinae, Dictyosiplionacefe, Scytothamnus. 



dosiphou halticus Gobi Braunt. finn. Meerbus. p. 12, t. I, f. 7-11, 

 Dictyosiphon Chordaria Aresch. ex parte, Coilonema Chordaria 

 var. simpliciuscula Aresch. Obs. phyc. III, p. 82. — Characteres 

 generis. 



Hah. ad lapides conchasqne in niari Baltico orientali ad oras 

 RossiiB et Germaniae (Gcbi, Reinke): ad oras Scandinavite circa 

 « Dalaro » (Kiellman). 



SCYTOTHAMNUS Hook. f. et Harv. [1845] in Lond. Journ. Bot. 1845, 

 p. 531 (Etym. scytos corium, cutis et thamnos frutex), Kuetz. Sp. 

 p. 546, J. Ag. Sp. I, p. 63, Till Algern. System. IV, p. 00, De 

 Toni Syst. Uebers. Fucoid. 1891, p. 178, Kjellm. in Engl. & Prantl 

 Nat. Pflanzenfam. 86, p. 214, Stereocladon Hook. f. et Harv. [1845?] 

 in Lond. Journ. bot. IV, p. 250, Fl. Antarct. crypt. p. 162, tab. 172, 

 J. Ag. Sp. I, p.83, Stereothalia Trev. [1849] In LiniicTaXXII, p.446, 

 Stereocaulon (ex errore typogr. ?) in Bot. Zeit. 1846, p. 206. — 

 Frons filiformis, paullulum compressa, repetite ramosa, ramis inge- 

 qualibus, intra gelatinam vix conspicuam solidescens, filis perlphe- 

 ricis radiantibus denique vestita. Axis fllis elongatis maximopere 

 intricatis in centro simplicioribus, versus peripheriam in reticuhim 

 anastomosibus densissimis conjunctis, muco subcoagulato obvallatis 

 constans. Fila radiantia (initio deficientia? denique) e reticulo peri- 

 pherico evoluta basique anastomosibus paucis conjuncta, in stratum 

 a superficie subcontinuum densissime stipata moniUformiter arti- 

 culata. Sporangia (sec. Harvey) oblonga, inter fila peripherica ni- 

 dulantia. 



Ohs. Axis potius Mesogloiam quam Chordariam structura 

 ffimulatur; fructificatio magis Chordarice. Reticulum nempe filoruni 

 anastomosantium, colorata substantia impletum, quasi sceletum 

 frondis efficit. Ex hoc introrsum decurrunt fila simpliciora centrum 

 occupantia, et extrorsum surgunt fila radiantia verticaUa. Mucus 

 subcoloratus fifis undique interfusus, coagulatus potius quam so- 

 Hdus. 



1. Scytolhamnus rugulosus (Bory), Stereocladon rugulosus Hariot Al- 757 

 gues (Mission du Cap. Horn) p. 41, Rhodomela. rugulosa Bory 

 Mem. Soc. Linn. de Paris IV (1824), p. 593, Gigartina rugulosa 

 Bory Voy. Coquille pag. 151, Stereocladon Lyallii Hook. et Harv. 

 Crypt. Antarct. tab. CLXXIV, Kuetz. Tab. Phyc. VI, pag. 19, 

 Dictyosiphonl Lyallii Kuetz. Sp. p. 485, Tal). Phyc. VI, p. 19 c. ic. 



