210 P. F. REINSCH OST FRESHWATER A1.QM 



involutis, cellulis sphaericis et ellipticis (in statu indiviso) intermixtis, 

 cytioplasraate subtiliter granuloso cytiodermate extforsum muco hya- 

 lino tenui velato ; cellulis perdurantibus (sporis) sphsericis sparsis cete- 

 ris cellulis paululo latioribus, cytiodermate crasso distincto, cytioplas- 

 mate granuloso. Diam. cellular. 0-0024-00032 millim., diam. cel- 

 lular, perdur. 00041 millim. 

 In tricbomatibus singulis inter alias algas Phvcochromaceas inter- 



jectis. 



Ab A. circinali in trichomatum forma persimili differt cellulis 

 plusquam quadruplo minoribus/cytioplasmate subtiliter granuloso 

 (in A. circinali granulis majoribus dense repleto). 



HORMOSIPHON LEPTOSIPHON, sp. n. 



H. globosum, magnitudine Pisi sativi, olivaceo-viride, physeumate sub- 

 cartilagineo intus molli, indumento exteriore subtenace ; tricbomati- 

 bus prolongatis, marginem physeumatis versus radialiter dispositis, 

 subcontortis, pallide aerugineis, indumento hyalino homogeneo decolo- 

 rato subtenui velatis ; cellulis subsphsericis subarcte conjunctis ; cel- 

 lulis perdurantibus sphaericis, ceteris cellulis duplo latioribus. Diam. 

 cellul. 00028 millim., diam. cellul. perdurant. 00056 millim., diam. 

 physeumatis 3*5-6 millim. 



In physeumatibus singulis inter Schizosiphontis Kerguelensis caes- 

 pites. 



Phy8eumatum observatorum duo procreant intus physeumata 

 singula filialia ellipsoidea tricbomatibus brevissimis subrectis et 

 leviter contortis indumento crasso hyalino decolorato velatis den- 

 sissime repleta, indumento communi distincto velata. Physeu- 

 matis externa pars plerumque ex tricbomatibus physeumatum 

 filialium tricbomatibus simillimis formata. Superficies physeu- 

 matum est vestita plantulis variis egregie Stigeoclonio subtih, 

 n. sp., singulis filis Enact idis Kunzeance et Polypotrichis jlaccid(B. 



9. H. coriaceus, Kutz. y var. kerguelenensis. 



Physeumate irregulariter cxpanso, subplano, subcoriaceo, colore obscure 

 rubro-fusco, in sectione transversali ex stratis 5is-7is formato, pen- 

 dermate (sectionis transversalis physeumatis) lateris superions cras- 

 siore lamelloso fusco, lateris inferioris peridermate tenuiore ; tricho- 

 roatibus vermiculiformibus multipliciter contortis, vaginis fiiscis ampus 

 distinctissimis plurilamellosis, cellulis sphaericis colore pallide »ru- 

 gineo. Diam. cellular. 00041 millim., diam. trichom. (cum vaginis) 

 0224-0 0278 millim. ; physeumatis crassitudo 0-139-0168 millim. 



Specimina majora in spiritu vini asservata ac in charts in- 

 terna. 



M Marshy ground near Vulcan Cove, Kerguelen's land, coll- Eaton, 



"in 



schedula. 





