PlixozDosporiiia», Myi'ioti-i(:liiai'(;a3, Myriotricliia. 5'J5 



<[ii(! i)l('iiro^'ciiii, iiommuKiuiuii lcriiiiiiiilia, uiiiscriutiiii 5-l.i-loc,clla- 



tii, ([iioquc loccllo zoojjjouidiiun (/.oogaiiictiun) iiiiicuiii gigncntc. Spo- 



nui^,'i:i atriiisque forma! per porum apicalem contentum evacuantia. 



Ohs. (Jcnus aqucc tluicis. 



1. Pleurocladia lacustris A. Br. in Rabenh. Alg. Saclis. n. 441, Kl. m 

 Kur. Al-ar. 111, ]>. 394, Klebahn & Wille 1. c. — Ctcspitulis nii- 

 nutis, pulvinatis, olivaceo-fuscis, gelatinosis. 



Hah. ad plantas aquaticas, imprimis ad caules Phragmiti- 

 dis communis etScirpi lacustris , ad conchas lapidesque 

 in lacu «Tegel See» dicto prope Berolinum (A. Braun), in pisci- 

 nis pr. «Mariendorf» (M.\gnus, Hennings, Wille), in lacu «Miig- 

 gelsee» dicto (Hennings), in lacubus «Ploen» aliisque proxima; 

 regionis (0. Za.charias, Klebahn). — Cellulae filorum repentium 

 et matrici adhferentium forma irregularcs in laminam basilarcm 

 pseudoparenchymaticam conjuiicttB, erectoruin ssepius cylindracea^, 

 membrana tenui extrorsum in gelatinosum stratum transmutata 

 instruct», omnes phEeophorum singulum parieti adpressum, aureo- 

 brunneum et nucleum minutissimum, subparietalem continentes. 

 Celiuke pilorum liyalin;e. 



2. Pleurocladia ralfsioides Born. in Flah.sur lc Lith. fontaimm (188:ij, 873 

 p. CVI (nomeii). 



Hah. in tUiviis Galloprovinciaj (Bornet). 



Familia XXllI. MYRIOTRICHIACE^ Kjellm. 



Ml/riod-iduaceLd KjeUm. [1890] Handbolc Skaiul. Hafsalgll. 1, p. 4G, De Toiii 

 Syst. Uebers. FucoiJ. 1891, p. 179, Kjellm. in Engl. & 1'rantl Natiirl. ['llaii- 

 zenfam. 86. Lief. p. 214. 



Frons ex axi filiformi, pilis et rainulis verruca^formibus aut cyliu- 

 draceis, definitis plus minus dense obsito constans; axis inferne e 

 serie singula cellularum compositus, superne fere homogeneo-paren- 

 chymaticus, multiplicatione intercalari (ad basin maxime perdurante) in 

 longitudinem crescens. Sporangia unilocularia tum singula et sparsa, 

 tum opposita vel plus minus dense verticillatim disposita, in axi aut 

 ramulis insidentia, globosa v. globoso-ovoidea, apice verrucifoi'mi pro- 

 minentia. Sporangia plurilocularia in ramulis acro- aut pleurogena, 

 solitaria aut subcaespitose aggregata, cylindracea v. quasi fusiformia, 

 uni-pauci-seriatim locellata. 



