MONOGRAPHIE DES OSCILLARIÉES. 



205 



gida, fragilia, ad genicula haud conslricta, eetate provecta 

 ad apicem sensim et longe atienuata, obtusa, leviler capi- 

 tata, 6 jj. ad 8 p. crassa. Articuli diamelro trichomatis duplo 

 ad triplo breviores, 2 (/. ad 4 longi, cunclis, apicalibus 

 exceptis, protosplasmate refringenti, grosse graniiloso farcii; 

 dissepimenta fréquenter granuiata; cellula apicalis paulu- 

 kim attenuata, truncata, calyplram convexam praebens 



(V.S.). 



Hab. lacum Moratensem Helveliae (Mougeot et Cbaillet 

 in herb. Thuret !). 



2. O. proiiiîca. 



Lyngbya prolifiga Greville, Scottish cryptogamic Flora, fcab. 303, 1828; e specim. 

 authent. in herb. Lenorniand! — Hooker, Englisli Flora, vol. V, part I, p. 370. 



OsciLLARiA DIFFUSA Farlow scc. Collïns iii Hauck et Richter, Phykotheka iiniver- 

 saZ/s, no 477!, 1892,. 



Planche Yl, fig. S. 



Stratum natans, valde expansurn^ conspicue purpureum 

 (sec. aucL), in speciminibus siccis amœne lilacinum. Tri- 

 chomata in totum recta, elongata, flexilia, ad genicula haud 

 constricla, aetate provecta ad apicem sensim et longe atte- 

 nuata obkisa capitata, 2,2 jj. ad 5 [^.crassa; articuli subqua- 

 drati vel diametro paulo longiores, 4 u. ad 6 longi, cuoc- 

 tis, apicalibus exceptis, protoplasmate refringenti, grosse 

 granuloso farcti ; dissepimenta fréquenter granuiata; cellula 

 apicalis paululum attenuata, truncata, calyptram depresso- 

 conicam praebens (y. s.). 



Hab. lacum llaining comitatus Selkirk Caledonice (Gre- 

 ville in herb. Lenormand !), lacum Moratensem llelvelia% 

 cum pra3cedente specie mixta (herb. Tliuret!), ctiam palu- 

 des Americiie fœderata3 prope Boston (CoUins!). 



3. O. Agaidhîî. 



NosTOC Vlos-\qv.e, y[\V(i,ens,Ai'g;i' (K/na/iciv, Docas \I, ii'^ (''!,1822 — i^ium Lyniiltyo. 

 nec Agardli). 



Stratum nataiis, \[\\(\(' e\[)aiisiHu, l;cle uM'iigiuosuiu. Ti i- 



