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249. P. elongella Ilarv. Br. Fl. filo primario crccto subrcciir- 

 vato iriferne suhcontinuo, mox articulato, ramis crectiusculis 

 subsecundatis obsilo, ramulis lateralibus penicillatis subsc- 

 cundato-dichotoiDis fastigiatis, articulis inferioribus diametro 

 brevioribus, superioribus longioribus sub 5-venosis. 



Hab. iii niari Adrialico; cx Tcigcsto et Insula Pago Biasoletlol 



Frons vix 3 pollicaris pLilclire rosea (liartse laxius adhoereus. Filumprima- 

 riuni basi crassitie pennae pas-erinae, cito in tcnuitatem capillarem attenua- 

 tum, inferne erectiusculiim mox recurvum ramos sursum emittens. Rami a 

 basi latiore altenuati, ramulis lateralibus eodem motlo decompositis versus 

 apiceni sensini brevioribus pyramidati. Rarnuli ultimi peniciilati subsecun- 

 datim dichotomi lasligiatique , ramellis basi vix attenuatis rachidem sub- 

 feqnantibus. Articuli in inlcjiorc planla coufluentes, dein irregulariter venosi 

 diamelro ^ubdimidio hrcviores, snperne regulares, siphonibus tribu5 notati, 

 diiimctro aef[ua1cs et longiorcs. biphoncs ipsorum diametro duplo longiores. 



250. P. ornata nov. sp. filo primario erecto subrecurvatoinlernc 

 continuo mox articuiato, ramis patentibus subsecundatis su- 

 perne rameliis latoraiibus abbreviatis tenuioribiis divaricato- 

 flexuosis subulatis obsitis, articulis inferioribus diametro bre- 

 vioribus, superioribus aequalibus 0-4 venosis. 



Hab. in mari Adriatico aliis Algis parasitica; a Tergesto dedil Biasoleitol 



Caespes 3-A pollicaris, cx ro>eo carneus inferne purpurascens, chartae 

 adhaerens. Fila primaria pennam passerinan» crassa, in cra^sitiem capiUarera 

 sensim attenuafa, a basi crecliuscula scd mox recurva, ramos undique emil- 

 tentia, subdivaiicala et cximie intricala saepeque ita conglutinata ut non nisi 

 fractis ramis extricamhi, ;u})cinc j-nbHclHiloma vel potius irregulariter se- 

 cundata. l\ami a basi latiore sensim aiigustali, eodem modo divisi et prseci- 

 que versus apicem raraulis laxis ornali. Ramuli quasi helerogenei, ramis 

 mukiplo tcnuiores. angulo ferc recto egredicnles, eximic flexi, simplices aut 

 saepis!?ime lamellis suhulatis divaricato-rccurvis obscssi. Arliculi in frondc 

 primaria reticulalim venosa inferne non distinguendi, supcrne diametro 

 subdimidio breviores, siphonibus 5-6 percursi; in ramulis mclius regulares, 

 diametrum a^qnant et siphones 3-4 aut apice binos moustrantes. 



Species pulchra P. elongellce proxima at ramulis mox distin- 

 guenda; a P. Ruchingerlet P. Elongata longius distat substan- 



