556 Protococcoideae, Volvocaccie, Polytoma. 



phar cilium) et in Notarisia 1889, p. 674. — Cellulne elongata?, an- 

 tice obtus;i\ postice pliis niinus attenuatfe; conteatus viridis; nucleus 

 centralis, nucleolo instructus; corpusculuni aniyliferutn niajusculum 

 in cellulse parte posteriori situm; stigma extans ; cilia corporis seu 

 cellulaD aBquilonga, 0-8, antice inserta; membrana tenuis, directe 

 plasma involvens. 



Propagatio cellulrc divisione longitudinali in 2 nova individua ; 

 cystse e cellula spha^rica, colorem viridem servante eftormatse, 

 germinando individuum singulum evolventes. 



1. Polyblepharides singularis Dang. 1. e, p. 155, t. XI, f. 37-46. — 1332 

 Cellulis 10-14=; 8-0; ceterum generis. 



Hab. \n aquis dulcibus ad « May )) circa ((Caen» GaHi:Te (V. P. 

 Dangeard). — Polyselmis viridis Duj. videtur liuic speciei similis. 



Genera quoad locum dubia vel inquirenda. 



?POLYTOMA Ehrenb. [1838] Infus. p. 24 (Etym. poly plus et tome 

 sectio), Krassilatschik Zur Entwickelungsgeschichte und Systematik 

 der Gattung Polytoma Ehrenb. in Zool. Anzeiger 1882, p. 426- 

 429!, Daugeard Recherch. sur les Algues inf(3r. in Ann. Scienc. Nat. 

 1888, p. 112, Saville-Kent Manual of the Infusoria pag. 301-301 

 tab. XV, f. 67-78, Cklamydoraonas sp. Cohn. — Cellulsn membrana 

 continua instructae; contentus hyalinus, ciliis excessis in statum 

 perdurantem transeuntes; nucleus nucleolatus centralis; vacuolum 

 singulum magnum (vel pljira minora) in cellula? parte antoriori 

 situm. 



Propagatio contentus bipartitione repetitr. in 2-4-8 zoogoni- 

 dia, membrana celluho lateraliter rupta libere exa minantia. 

 Obs. Genus, suadente Dangeard, in Ilcumatococceis intimum, 



1. Polytoma Uvella Ehrenb. luf. pag. 21, n. 3;'., tab. I, f, XXXII, 3331 

 Schneid. Symb. I, p. 130, Dang. 1. c, p. 112, t. XI, f. 1-4, Chla- 

 mydomonas hyalina Cohn in Nov. Act. XXIV, 1, p. 160, t. XVI, 

 f. 1-9, Fresen. Beitr. pag. 235, t. X, f. 30-38, Rabenli. Fi. Eur. 

 Algar. III, pag. 96, Kirciin. Alg. Schles. p. 92, Wolle Freshw. 

 Alg. U. S. p. 108, t, 151, f, 9-10. — Cellulis oblongis ellipticisve, 

 utrinque late rotundatis, dilutissime viridibus vel hyalino-albican- 

 tibus, macula rubra destitutis, 1 4-22 a. latis, subd uplo longioi-ibus, 

 polo antico ciliis binis elongatis, t(^gumonto arcto instructis, 



llab. in aqua putrida, in consortio Vihrionuhi, Spirillorum in 



