Pr otococcoideae, Volvocaceae, Polyblepharides. 555 



Obs. Genus Telraselmtdi Stein et Chlamydomonadi hlhrenb. 

 subaffine. 



1. Corbierea vulgaris Dang. loc, cit. p. 384 cum icone. — Characteres 1329 

 generis, 



Hab. in stagnis aqu£e dulcis haud procul a mari in Gallia (P, 

 A. Dangeard). 



PITHISOUS Dang. [1888] Recherches sur les Algues inferieures in 

 Anii. scienc. nat. 1888, p. 138, et in Notarisia 1889, p. 674 (Etym. 

 pil/mcos doliolum), — Tliallus dolioliformis; memhrana communis 

 (tegumentum) crassa; cilia 4 e basi papilla) minuta?, conicre, antice 

 sita3 exsurgentia; contentus saturate viridis; nucleus nucleolo prae- 

 ditus; corpusculum amyliferum postice situs; stigma extans. 



Propagatio 2-4-8 zoogonidiis, membrana in 2 operculos sece- 

 dente libere examinantibus. [Zygota et cystLB ignota]. 



1. Plthiscus Klebsii Dang. 1. c. tab, XII, f, 1-6. — Characteres ge- 1330 

 neris; cellulis ad 24 y.. diara. metientibus, 



Hab. inter P a n d r i n a m M r u m et G n i u m q u a d r i j u- 

 gum pr. ((Caen» Gallia? (P. A. Dangeard). 



TETRASELMIS Stein [1878] Infus. p. 142 (Etym. fetra quatuor et 

 selmis transtrum), Dangeard Rech. sur les Alg. miew in Ann. Scienc. 

 Nat. 1888, p. 142, t. Xl, f. 36, Cryptoglena^ sp. Carter. -- Cel- 

 lulae vegetativae globulosa^, plasmate granuloso, chlorophyllaceo fcje- 

 \?e, tegumento cordiformi, rotundato, pellucido, antice emarginato, 

 postice rotundato prsedita?, ciliis 4 per tegumenti orificium singu- 

 lum exeuntibus, stigmate mediano et peripherico, nucleis 1-3 (?) 

 instruclas, 



Propagatio (ex Carter) cellulis in cystas transmutatis quarum 

 contentus demum in sporas (?) numero varias dividitur; (ex Dangeard) 

 cellulis sphcericis quarum plasma in 2 partes (individua) dividitur. 



1. Tetraselmis cordiformis (Cart.) Stein 1, c, Dang. 1. c, Crypto- 1331 

 glena cordiformis Carter. 

 Ilab. in aquariis passim. 



PaLYBLEPHARIDES Dang. [1888] Recherches sur los Algues infe- 

 rieures in Ann. scienc nat. 1888, p. 155 (Etym. poli/ plus et ble- 



