224 



Species mihi ignotae. 



I. granulosa Naeg. (in Ktz. Spec. p. 343.). I. crusta lapidea 

 crassa , calcarea , durissima , superficie granuloso - botryoide , ex phyco- 

 matibus minoribus globuliformibus glomeratim aggregatis , arcte con- 

 junctis composita; trichomatibus internis erectis , ramosis, fastigiatis, 

 subdichotomis , basi '/.joo — l J30o'" crassis , continuis, fasciculatis , vires- 

 centibus, laxe dispositis , apice tenuioribus achromaticis ( ! /65o'" cr.), 

 vagina propria subtilissima arctissima hyalina cinctis , in substantia 

 matricali achroa homogenea, vel indistincte fibrosa nidulantibus. — Tn 

 rivulis ad Turicum (Naegeli). 



I. umbilicata Naeg. (in Ktz. Spec. p. 895.). I. subglobosa dense 

 aggregata, botryoides , phycomatibus singulis (*/2 — 1"') vertice umbili- 

 catim retusis, superficie laevibus, albis. — In rivulis Helvetiae. 



I. fusca Ktz. (Osterprogr. p. 9. N. 24.). I. thallo (phycomate) 

 fusco, subgloboso , duro , intus zonato , fuscescente ; trichomatibus sub- 

 crassis (diam. 1 / lso )> fibris vaginalibus tenuissimis. — Tn fontibus Ba- 

 variae (de Martius). 



Ii. ItlerizOlliyria {Pollini) Ktz. (1843): Trichomata flagelli- 

 formia simplicia , rarius pseudoramosa, arctissime vaginata , basi cellula 

 perdurante instructa, sursum moniliformia , in apicem capillarem cuspi- 

 data , in muco matricali nidulantia, plerumque in stratum difforme 

 coacervata. — Conf. Fig. nostr. 51. 



M. litoralis Ktz. (Phycol. gener. p. 232. N. 4. T. 7. F. IV.). 

 M. tnchomatibus moniliformibus, subito in apicem piliformem attenuatis, 

 in stratum tenue late expansum, superficie ferrugineo -rufescens vel 

 saturate aerugineo-nigrescens , subtus plerumque virescens collectis; 

 articulis ellipticis , arcte connexis , granulosis ; cellulis perdurantibus 

 globosis, articulorum diametro paulo vel duplo majoribus, diu coloratis; 

 vaginis arctis tenuissimis, hic illic conglutinatis vel in mucum matricalem 

 diffiuentibus. v. v. 



Diam. artic. '/205— l lr,-"' = 0,00033—0,0005". 



Hab. in litoribus sabulosis Europae borealis passim : in insula 

 Wangerooge (H. Koch) , in collibus arenosis litoralibus ad Dantiscum 

 legit Klinsmann ; ad Malmd Sueciae legi ipse. 



M? flagelliformis Ktz. (Spec. et Tabul. 1. c). M. innata, fascicu- 

 lato - caespitosa , aeruginea, fluctuans ; trichomatibus validis flagelliformi- 

 bus , leviter flexuoso - curvatis , basi submoniliformibus ; in apicem hya- 

 linum flaccidum longe productis , aretissime vaginatis , muco matricali 

 subachroo subliquido involutis ; articulis inferioribus compresso-subdisci- 



