232 



ED. BORMET ET CH. FLAHAILT. 



7. A. cntcnni» 



Spii^rtozYGA. CATENULA Kutzing, Species AUjar., p. 893, 1849; e specim. auth. in hcrb. 

 Montagne! 



DOLIGHOSPERMUM Smithii Tliwaites in Ralfs, On the Nostocliineœ, in Annah and Mcuj. 

 ofnat. Hisl., ser. II, 1850, V, p. 336, tiib. IX, fig. 4; c specim. Brebissoniano in 

 hei'b. Thuret! 



DOLICHOSPERMUM IN.EQUALE Ralfs, 0/1 the Nostoclimcœ, in Annals and Mag. of nul. 



HiH., ser. II, 1850, V, p. 335, tab. IX, fig. 1; e specim. autli. in licrb. Lenorniand! 

 Anaiî.'ENA Smithii Wittrock et Nordstcdt, Algœ exsicc, n° 197 !, 1878 ; — Coolve, Brilish 



fresh-water Algœ., p. 287, tab. 93. fig. 7. 

 Anab/ena iN.EQUALis Cookc, Di'itish fresh-water Algœ, p. "122, tab. 93, fig. 4.. 1884. 



Strato gelatinoso, natante, œrugineô ; trichomatibus flexiio- 

 sis 5-8 (X crassis, cellula apicali rotundata; vaginis in adultis 

 diffluentibus ; articulis doliiformibus diamelro plerumque 

 paulobrevioribus; heterocystis subsphaîricis vel oblongis, arti- 

 culis paulo majoribus, 6-9 [x crassis, 9-13 jx longis; sporis 

 heterocystis proximis vel ab eis remotis, evolutione centri- 

 fuga, plurimis catenatis, cylindricis, in média parte leviter 

 constrictis, apicibus rotundato-triincatis, 7-10 [x crassis, 

 16-30 [X longis, episporio lo3vi pallide fuligineo (v. s.). 



Hab. in fossis et stagnis Sueciae (Nordstedt in Wittrock et 

 Nordstedt, Algse exsiccat. !), Germaniœ (Al. Braun in herb. 

 Lenormand !), Angliœ (Ralfs in herb. Lenormand!), Galliœ 

 (Lebel in herb. Mus. Par.!) et Italiœ superioris (Meneghini 

 in herb. Mus. Par. !). 



8. A. Fcli.sii 



Cylindrospermum Felisii Meneghini in Kiitzing, Species Algar., p. 294,1849; Tabulée 



phijcolog., I, p. 53, t. 99, fig. VI; e specim. autli. in licrb. mus. Par.! 

 Spu/erozïga anisococca b. Felisii, Rabonlioist, Flora europ. Algar., II, p. 194, 1865. 



Strato serugineo, dedaleo-mesenterico; trichomatibus rectis 

 parallelis, muco firmiori agglutinatis, 6 [j. crassis, haud toru- 

 losis ; articulis cylindricis, geniculis vix contractis, longioribus 

 (usque ad duplo) quam latis; heterocystis oblongis 12 cir- 

 citerlongis; sporis (maturis) 10-1 2 [j. latis, usquead 45[xlongis, 

 subseriatis, valde inaîqualibus, haud raro vagina indutis (v. s.). 



llab. in Ilalia superiori propc Ferrara (Meneghini!). 



