14!» 



oeus vel subfiliformis, solitarins vel fasciculatus, aitioulis diametro duplo 

 brevioribus. v. s. 



Long. c. stipit. ' .„,— ' , i:i «" = 0,00098 — 0,0014", lat. ' ,,m'" = 

 0,00018". 



b. Forma elongata, ad ■ .V" = 0,0017"' Longa. 



Hab. in Cladophora gossypina var. intricata prope Giessen Ger- 

 Boaniae , ubi lb.">0 detexit A. Braun ; in Conferva et Oedngonio in 

 Bexten Tyrolensi (dc Hausmann) ; in Cladophora puteali prope Horn- 

 stein in Austria inferiori legit A. Grunow. 



Ch. Schiedermayeri Ghrun. (Mspt.). Ch. e basi angusta subcylin- 

 draceus, sursum leviter incrassatus, articulis diametrumsubaequantibus. v. s. 



Long. c. stipit. Vso— Veo"' = 0,0011-0,0014", lat. l/ 8W i_l/ 400 "' 

 = 0,00029—0,0002". 



b. subclavata Grun. } forma paulo crassior, subclavata, l j-a'" = 

 0,00128" longa, lat. max. '/W — 0,00039". 



Hab. in vngina Calothricis Wrangelii Ag. in fonte „ Moosbach " 

 prope Michldorf Austriae superioris (a cl. Schiedermayero lect.) ; b) in 

 vaginis Calothricis Brebissonii Ktz. prope Vocklabriick (de Morl). 



Ch. incrustans Ghrun. (Mspt.). Ch. minimus , dense aggregatus, 

 cylindraceus vel clavatus , articulis indistinctis . terminalibus distinctis 

 rotundatis , vaginis delicatissimis. v. s. 



Long. ' 250 — * i.M)'" = 0,00035— 0,00059", lat. max. V«oo— Viouo"' 

 = 0,00014—0,00009". 



b.? forma juvenilis semper subglobosa densissime incrustans. 



Hab. in vaginis Calothricis Wrangelii Ag. in „ Seebach " Austriae 

 superioris (Schiedermayr), in Scytonemate turicensi rivulorum alpinorum 

 tyrolensium (de Heufler) , Anssee (Bulnheim), prope „ Agosta M in Ve- 

 netiis (Venturi) ; b) in Calothrice mirabili in fonte „ Fiirstenbrunnen " 

 prope Salisburgum (Sauter). 



Ch. gracilis Rabenh. (Mspt.). Ch. gracilis, filiformis, solitarius, 

 cylindraceus, articulis distinctis, diametro subduplo longioribus, geniculis 

 liyalinis, cytioplasmate homogeneo pallide aerugineo. v. v. 



Long/ 1 :■>'" = 0,0012", lat. L /noo'" = 0,00005". 



Hab. in Vaucheria clavata, in fossa prope Strehlen ad Dresdam 

 vere 1864 (legi ipse). 



XXIX. Hydrocoleuiii Ktz. (1843): Phormidii tricho- 

 mata plura fasciculatim congesta, saepius contorta , vagina mucoso-mem- 

 hranacea communi inclusa. Tales fasciculi in thallum caespitosum ad- 

 natum aggregati sunt. — Genus Chthonoblasto proximum et quasi 



