Confervoidese, Coleochsetace«, Chsetopeltis 11 



CH>ETOPELTIS Berth. [1878] Unters. iiber die Verzweigung einig. 

 Siisswasseralgen pag. 40 (Etym. a chcBte seta et peltis clypeus), 

 Moebius Beitr. zur Kenntn. Chsetop. in Bericht. d. Bot. Ges. VI, 

 1888, pag. 242. — Thallus disciformis, orbicularis, laste viridis. 

 adnatus, aquaticus, epiphyticus, parenchymaticus, habitu Coleochae- 

 tes; contentus cellularum e protoplasmate granuloso in quo singu- 

 lum pyrenoide acute limitatum, substantia chlorophyllosa aequaliter 

 diffusa, (chlorophoris irregulariter definitis) cinctum constans. Mem- 

 brana cellularis crassiuscuia , subgelatinosa (quasi ut in Entero- 

 morpha), in setas longas et tenues, inarticulatas et farctas, ad ba- 

 sim vix incrassatas, singulas vel plures producta; cellulse l-ucleat.ie. 

 Propagatio zoogonidiis e contentus cellularum divisione succe- 

 danea 2-4-8 ortis, oblongo-ovatis, magnitudine varia donatis, rae- 

 dio pyrenoide singulo, antice ciliis longis 4 et lateraliter macula 

 rubra (stigmate) instructis, diffluentia membrana; cellulae-matris 

 liberatis. vesicula tenui deiu rupta insimul involutis. Zoogonidia 

 horam fere dimidiam libere natantia, dein immobilia ambituque cri- 

 spatulo-plicata, parte hyalina substrato adfixa, dein explanata et 

 mox germinantia (ex Berthold). 



Generatio zygotis e zoogonidiorum biciliatorum in una alterave 

 cellula vegetativa ortorum copulatione ortis (ex Moebius). 



1. Chsetopeltis orbicuiaris Berth. Unters. iiber die Verzweigung ei- 8 

 nig. Siisswasseralgen p. 53, t. 4, fig. 6-14. — Thallo orbiculari, 

 usque ad I mm. diam.; zoogonidiis (zoosporis) 9-12 =; 3,5-5,5. 



Hab. ad plantas aquaticas submersas, in stagnis prope Gottin- 

 gam Germaniae. — Species haec, observante cl. Hansgirg in Flora 

 1888 p. 219, est (setis haud vaginatis exceptis) speciminibus ase- 

 xualibus Coleochcetes scutatce a cl. Pringsheim in t. I, f. 4, illu- 

 stratis simillima, ut an ad ColeochaHaceas hoc genus spectet vix 

 dubitare liceat. Idem ac Chcetopeltis Berth. esset, observante Bor- 

 zi in litt., genus Chromopeltis Reinsch, quod genus vero ob seta- 

 rum absentiam ego ipse potius Phycopeltidi Mill. ad Mycoideacea- 

 rum appendicem descripto adscribo. Vix inter Coleochcetaceas at 

 aptius inter Ulvaceas recensendum cumque JJlveUa Crouan mihi 

 comparandum videretur genus quoddam marinum sub nomine Prin- 

 GSHEIMI^ a cl. J. Reinke in Ber. d. Bot. Ges. in Berlin VI, 7, 

 p. 241 brevi diagnosi propositum et in Algenflora der Ostsee etc. 

 amplius descriptum. Quamobrem genus a Reinke conditum, in hoc 

 voluraine, locum systematicum inter Ulvaceas teneat. 



2. Cliaetopeitis minor Moeb. Beitrag zur Kenntn. der Algengatt. Chse* ^ 



