ConjtigatiB, Desraidiacete, Closteriuru. 847 



cibus aclirois acutis; pyrenoidibus in utraque semicellula 5-6, 

 iii serie simplici axillari dispositis; locello magno, apices versus 

 sito, corpuscula numerosa includente; membrana pallide strami- 

 nea, exstria; sutura conspicua ; zygotis globosis. 



Hab. in stagnis imprimis in Italia (De-Toni, Levi, Martel, 

 Delponte), Gallia (Brep.isson, Petit), Britannia (Ralfs, Arciier, 

 Cooke), Germania (Kuetzing, Rabeniiorst), Austria (Grunow), 

 Belgio (De-Wildeman), Hispania (D."^ M. Lewin), Serbia (IsT- 

 VANFFi), Rossia (Artari), Hungaria (Istvanffi), Suecia (Cleve, 

 Lundell), Fennia (Elfving), Nova Semlia (Wille), America boreali 

 (Wolle), ins. (( Portorico » et ad (( Fajardo » (Lagerheim), ad 

 (( Montevideo )) et c( Conception del Uruguay » nec non in Brasilia 

 Americse australis (Wille), in Birmania (Joshua), Mongolia 

 (Przewalski) et Japonia (Roy, Bisset). — Dimens. cell. ex Del- 

 ponte 220 ^ 30, diam. cell. ex Wolle '40-60 a. — Var. angulatum 

 Bals. Alghe dei com. di Napoli p. 37, t. I, f. 15-17: ceilulis se- 

 milunaribus, parum curvatis, 160^56, medio parte dorsuali et 

 ventrali subito porrectis; endochromate cum pyrenoidibus unise- 

 riatis, plus minus evidenter linea media ordinatis. In aquario ad 

 Neapolin Italia? (F. Balsamo). — Forma elatius Lev^in Ueber spa- 

 nische Siisswasseralgen p. 9, t. I, f. 17 et in Notarisia 1889, p. 741 : 

 fornice t.ypicae paullulo latius. Dimens. 178,5 «^26,7 a. In prov. Ma- 

 lagensi, in alveo rivuli (( Ciuadalhorces » circa (( Carhima » Hispa- 

 nise (Nilsson). 



74. Closterium tetractinium Gay Essai xMonogr. Conjug p. 73, t. II, 2026 

 f. 14. — Cellulis parvis, 70-75 s 15, semilunatis, latere dorsuali 

 tumido, apicibus acutis; chlorophoris e 4 ta^niis compositis, py- 

 renoidibus duobus instructis ; locellis terminalibus, conicis, corpu- 

 scuia 10-12 trepidantia foventibus. 



Ilab. in rivulis circa (( Montpeilier in Gallia (F. Gay). — 

 CloalerivAn Leibleinii Kuetz. (in statu juvenili) in mentem revocat. 



75. Closterium Ralfsii Br(3b. in Ralfs F>rit. Desmid. p. 174, t. XXX, 2027 

 f. 2, Liste p. 155, Rabenh. Fl. Eur. Algar. III, p. 135, Wolle 

 Desm. U. S. p. 46, t. 7, f. 10, Cooke Brit. Desm. p. 14, f. 2, t. 15, 



f. 8, Hansg. Prodr. p. 183, Wittr. et Nordst. Alg. aq. dulc. exs. 

 n. 175. Closier'iuin lUilfsii a lijpicum Klebs Desm. p. 18, t. 2, f. (1, 

 b-c, Closlerium ro^tralum Ralfs in Jenner Flor. Tunbr. Wells. 

 1845, p. 196, Archer in Pritch. Inf. p. 479, Rabenh. Alg. n. 1789! 

 — Robustum, subrectum, ventricosum, utrinque in rostrum lineare 

 paullum incurvum, dilute umbrinum, obtusum, subito attenuatum. 



