626 Protococcoideae, Palmellaceae, Characium. 



cellulae dimidium longitudine Jiequante vel subaequante, basi in di- 

 .sculum fuscescentem pauUulum dilatato; cytioplasmate viridi, homo- 

 geneo vel guttato-punctato, postea oviformi-contracto, obscure vi- 

 ridi, subfuscescente, tandem divisione obliqua in zoogonidia qua- 

 tuor mutato. 



Hab. in aquario parvo, in quo variae algae, iraprimis Desmi- 

 diea3 per aliquot annos colebantur, in Germania (Rabenhorst). — 

 Apertura maxime propria, memorabilis, cellula quasi deopercu- 

 lata. 



26. Characium obtusellum De-Toni, Hijdinanum obtusum .\. Braun i^<56 

 Alg. Unicell. p. 28, Rabenh. Fl. Eur. Algar. III, p. 90 nec Chara- 

 cium obtusum A. Br. Alg. unicell. p. 39. — Cellula oblonga vel 

 ovata, circ. 32» 16, breviter stipitata, apice obtusa; cytioplasniate 

 maculatim interrupto. 



Hab. in plantis aquaticis ad Berolinura in Germania (A. Braun). 



27. Characium ensiforme Herm. I. c. n. 9, t. VI, B, f, 1, Rabenh. i^67 

 Fl. Eur. Algar. III, p. 87. — • Cellula erecta, inaequali, lineari-lan- 

 ceolata, subensiformi, saepius undulato-tumidula, acuminata; sti- 

 pite brevi, tenui, basi pauUuhim nodoso-iucrassato; cytioplasmato 

 graaulato, viridi, pallide maculato. 



Jlab. in palude ad «Neudamm» in Neomarchia (J. Hermann), ad 

 «Waitati river, Hutt Valley, Rotorna» Novse Zelandiae (S. Berggren 

 sec. Nordstedt). 



28. Characium Tuba Herm. in Rabenh. Beitr. I, p. 27, n. 14, t. VII, H6S 

 f. 4, Hydrianum Tuba (Herm.) Rabenh. Fl. Eur. Algar. III, p. 88. 



— Cellula distincte stipitata, sequali, erecta vel arcuato-adscen- 

 dente, cjlindraceo-obovata, diametro 4-6-plo longiore, apice obtusa 

 vel rotundata, inferne in stipitem gracilem, basi nodoso-incrassa- 

 tum sensim attenuata. 



Hab. in fossis, Hypno cordifolio gregarie insidens, prope 

 «Neudamm» in Neomarchia (Hermann) et in Stratiotes foliis 

 eodem loco (Rabenhorst) ; in Rossia (Riabinine). — Dimens. cell., 

 ex Riabinine, 21-24 ^ 6,5-7,5; stipes circ. 9 a. longus. Cellula tetate 

 provecta vertice apertura ampla patescit, cytioplasma in corpus uni- 

 cum ovale contractum. 



29. Characium epipyxis Herm. in Rabenh. Beitr. p. 28, n. 18, t. VII, 1460 

 f. 13, Hydrianum epipyxis (Herm.) Rabenh. Fl. Eur. Algar. III, 



p. 89. — Perpusillum; cellula erecta, iequali vel subsequali, piri- 

 formi obovata vel oblongo-obovata, apice rotundata, aetate provecta 

 patescente, apertura ampla, vix coustricta, iuferne in stipitem su« 



