1 



904 CoDJugatse, Desmidiacefe, Pleuroteenium. 



spiniformibus, quadri-partitis, hyalinis obsitum ; apicibus truncatis. 

 Hab.Sid «Hong-Kong» Sinarura (Kaye). — Forma? Lagerheimii 

 Notarisia 1888 p. 603, Pleurotcenium Kayei forma (sine nomine) 

 Lagerh. Desmid. aus Bengalien p. 10, t. I, f. 8: semicellulis ver- 

 ticillis prominentiarum 5 prseditis, apice a vertice viso aculeis 15 

 instructo. Long. cell. 300 [x. Ad Myriophyllum in Bengalia 

 Asiae (Hooker). Forma typica antea pr. « Hongkong » reperta, ut 

 supra relatura est. 



22. Pleurotaenium caldense Nordst. Alg. brasiL t. II, f. 2 et in Hed- 218O 

 wigia 1878, p. 78, Lagerh. in Notarisia 1888, p. 595. — Medio- 

 cre, subcylindricum, 408-420 ^ 26, basi apiceque 30 p.. latum, dia- 

 metro circiter 14-ies longius, medio modice constrictum, sutura 

 paullura prosiliente, isthmo 21-24 jx. lato; semicellulis levissime 

 (circiter 14-ies) undulato-constrictis, tumore basali majore, propius 

 apicem sensim dilatatis, apice coronula dentium (circite 8 a fronte 

 visorum) ornato truncatis; membrana punctata. 



Hab. ad « Capivary » prope « Caldas » in Brasilia Americae 

 australis (Nordstedt) ; ad Limnanthemum Grayanum in 

 insula Cuba ("Wright). 



23. Pleurotaenium Metuia Lagerh. Bidrag till Amerikas Desmidie- 218I 

 flora p. 251, t. XXVII, f. 30 et in Notarisia 1886, p. 92. — Mediocre, 

 360x34, medio modice constrictum, sutura non prosiliente; semi- 

 cellulis e basi non vel paulum dilatata infra raedium valde inflatis, 



ad apicem truncatum attenuatis; membrana hyalina, punctata, in 

 apice seraicell. aculeis vel verruculis carente. 



Hab. in insula Cuba. — Lat. apic. celi. 12 jj.., lat. isthm. 12 [i.. 2182 



24. Pleurotaenium? minutum (Ralfs) Delponte Specim. Desm. Ital. 

 p. 227, t. 20, f. 17-21, Docidium minutum Ralfs Brit. Desm. 

 p. 158, t. 26, f. 5, Cooke Brit. Desm. p. 16, t. 8, f. 1, WoUe 

 Desm. U. S. p. 52, t. 50, f. 29-31, t. 10, f. 9, Hansg. Prodr. p. 188, 

 f. 110, Penium minuium Cleve Sver. Desm. p. 493, Lund. Desm. 

 Suec. p. 87, Rabenh. Fl. Eur. Algar. p. 122, Penium RalfsiiDe- 

 Bary Conjug. p. 73, t. 5, f, 8?. — Rectum, cylindraceum, 186- 

 252 ^ 7-14, ad apices dimidio fere latum, medio leniter constrictum, 

 mox tumidura et apices versus sensim sensimque angustatum, api- 

 cibus plano-rotundatura ; membrana tenui, levi. 



Hab. in turfosis in Britannia (Ralfs, Cooke), Gallia (Brebis- 

 son), Dania (Jacobsen), Bohemia (Hansgirg), Germania (Raben- 

 horst), Suecia (Cleve, Lundell), Norvegia (Nordstedt), Italia 

 (De-Notaris, Delponte), Hungaria (Istvanffi), Lituania (Raci- 



