842 Conjugat:!', Desmi(liacea3, Closteriiim. 



medio striis transversis 1-3 oriuita, striis tnembranae 10-12 (6-9 

 in 10 u); zygotis globosis, 28-31 u. diam., levibus. 



Ilab. in turfosis in Italia (Martel, De-Notaris), Hungaria 

 (ISTVANFFi), Germania (Klep.s), Hibernia (Arciier), Norvegia (Nord- 

 stedt), Dania (Jacobsen), Suecia (Lundell), Fennia (Elfving), ad 

 «Blueskinbay et Taupo » in Nova Zelandia (S. Berggren). — 



. Forma angustlus Nordst. Freshw. Alg. of N. Zeal. and Austral. p. 69: 

 crassit. 11-15 y.,, longit. 120-176 u.; striis longitudinalibus 6-7 io 10 

 ■j.. Ad «Christchurch, Rluff, Papakauri, Taupo » in Nova Zelandia 

 (S. Berggren). 



63. Closterium Archeriarum Cleve in Lund. Desm. Suec. p. 77, t. 5, ^oir. 

 f. 13, Cooke Brit. Desm. p. 27, t. 13, f. 5, Nordst. Norg. Desm. 



p. 40, Jacobs. Apergu p. 175, Clos.leriuin Archermmim var. fypi- 

 cum Klebs Desm. Preuss. p. 13. — Angusto ianceolatum, 196-230 :i 

 18,5-21,5, diametro 10-11-ies longius, valde ?equaliter curva- 

 tum, semilunare vel subsemicirculare, latere ventrali non tumidum, 

 utrinque in apicem subobtusuin, plus minus porrectum sensim 

 ivqualiter attenuatum, in media parte striis transversalibus 2-4 in- 

 structum; membrana luteolo-fuscescente, longitudinaliter striata, 

 striis circiter 10 ; pyrenoidibus secus seriem unicam dispositis; lo- 

 cello indistincto corpusculum singulum includente 



Hab. in aquis stagnantibus passim in Fennia (Elfving), fn Srao- 

 landia (Cleve) et Uplandia Sueciae (Lundell), in Dania (JaCOBSEn), 

 Norvegia (Nordstedt), Germania (Klebs), Britannia (Cooke). -*- 

 Habitu est Closterw arcuato Breb., apicibus CloMerio porreclo 

 Nordst. propius, membrana striata ad Cl. regulare Breb. et Cl. 

 Cijnthiam De-Not. prope accedens. 



64. Closterium calosporum Wittr. Anteckn. p. 23, f. 11, Lund. Desm. 2016 

 Suec. p. 81, Cooke Brit. Desm. p. 27, t. 13, f. 6, Wille Nov. Seml. > 



p. 60, — Parvum, semilunare, medio liaud inflatum, gracile, 70-95 

 ;:; 10-12, apicibus acuminatis; pyrenoidibus uniseriatis; membrana 

 demum subtilissirae striata; zygotis globosis, 20 a. diam. processibus 

 conoideis instructis. 



Hab. in aquis in Fennia (Elfving), Hibernia (Archer), Suecia 

 (WiTTROCK, Lundell), Nova Semlia (Wille). — An membrana 

 hujus speciei striata sit, cfr. Lundell 1. c. 



65. Closterium areolatum Wood Freshw. Alg. U. S. p. 111, t. XI, f. 6, 2017 

 WoIIe Desm. U. S. p. 43, t. 7, f. 3-4. — Fusiforme, subrectum 



vel nonnihil incurvum, latere ventrali raedio sncpe paullulum con- 

 cavo, 60 a. latum, diaraetro 9-10-ies longius, utrinque modice at- 



