454 Pli£cozoospoi'infe, Dictyosiphonaceje, Scytotliamnus. 



dosiplion halticus Gobi Braunt. finn. Meerbus. p. V2, t. I, f. 7-11, 

 Dicfi/osiphon Chordaria Aresch. ex parte, Coilonema C/iordaria 

 var. simpliciuscula Aresch. Obs. phyc. III, p. 32. — Characteres 

 geiioris. 



Hah. ad lapides conchasqne in uiari Baltico orientali ad oras 

 RossiEe et Geraianic-e (Gcdi, Reixke : ad oras Scandinavi;e circa 

 « Dalaro » (Kiellman). 



SCYTOTHAMNUS Hoolc. f. et Harv. [184.-.] in Lond. Journ. Bot. 1845, 

 p. ho\ (Etyin. sci/tos corium, cutis et tluunnos frutex). Kuetz. Sp. 

 p. 546, J. Ag. Sp. I, p. 63, Till Algern. System. IV. p. 60, De 

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

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

 in Lond. Journ. bot. IV, p. 250, Fl. Antarct. o-ypt. p. 162, tab. 172, 

 J. Ag. Sp. I, p.83, Stereot/ialia Trev. [1849] in Linna?aXXII, p.446, 

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

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

 qualibus, intra gelatinam vix conspicuam solidescens, filis periphe- 

 ricis radiantibus denique vestita. Axis fiUs elongatis maximopere 

 intricatis in centro simplicioribus, versus peripheriara in reticulum 

 anastomosibus densissimis conjunctis, muco subcoagulato obvallatis 

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

 plierico evoluta basique anastomosibus paucis conjuncta, in stratum 

 a superficie subcontinuum densissime stipata moniliformiter arti- 

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

 dulantia. 



OIjs. Axis potius Mesogloiam quam Chordariam structura 

 a^mulatur; fructificatio magis Chordarioi. Reticulum nempe filoruni 

 anastomosantium, colorata substantia impletum, quasi sceletum 

 frondis efficit. Ex hoc introrsum decurrunt fila simpliciora centrum 

 occupautia, et extrorsum surgunt fila radiantia verticalia. Mucus 

 subcoloratus filis undiquo interfusus. coagulatus potius quam so- 



1. Scyfothamnus rugulosus (Bory), Stercocladiui mgvlosus Hannt Al- 7,^7 

 j^ues (Mission du Cap. Horn) p. 41, Rhodomela rugulosa Bory 

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

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

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

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



