Protoeoccoidefe, Volvocacea3, Volvox. 535 



TiMbus prima: Oogamm Hansg. rrodr-. p. 100 [Oogamew) — Volvocacece 

 scxuales Kirchii. AI^'. Schlcs. p. 35. 



Coloiiiffi sexnales oogonia et antheridia pra>bentes; generatio oosporis. 



Gonspectus generum 



Volvox Cellula) numerosissiraai (ad 12000) in colonias consociatfe. 

 Euflorina. Cclhil;i3 16-32 (raro 04) in colonias consociatfc. 



VOLVOX (L. 1758) Elirenb. [1830] Infus. pag. ()S (Etyra. volvere 

 h. e. rotare), De fabrica interna, struclura, propagatioae, fciccun- 

 (latione sexuali conf. imprimis Ferd, Cohn (vide supra), Busk in 

 Transact. Micr. Journ. 1852 p. 35, 1853 p. 31, Williamson ibid. 

 pag. 45, Focke Physiologische Studien 1847 pag. 31, Perty Zur 

 Kenntniss kleinster Lebensformeo. 1852 p. 84, Stein Infusionsthie- 

 re 1854 p. 46, Currey in Annals and Magazine of Nat. History 

 1859, 3, p. 5, Pritchard History of Infusoria 1801 p. 80, .J. Draxton 

 Hicks on the Motionless Spores (Stato-spores) of Volvox in Micr. 

 Journ. 1861 p. 281, t. IX, Rabenh. FI. Eur. Algar. III, pag. 97, 

 Kirchn. Alg. Schles. p. 87, Cooke Brit. Freshw. Alg. p. 56, Drude 

 Ueber Bau und Entwick. der Kugelalge Volvox 1882, Wills On the 

 structure and Life history of Volvox globator 1880, Wolle Freshw. 

 Alg. U. S. p 157, Hansg. Prodr. p. 100, Klein Beitr. zur Kenntn. 

 der Gattung Volvox 1888. — Colonife globosae, plerumque 100- 

 700 [j.. diam. metientes, e cellulis nuraerosissimis (ad 12000) com- 

 positfc, iatus cava3; cellulas subglobosae vel lentiforraes in soquali 

 distantia in stratum singulum periphericura giobi (colonia)) intus 

 aqua repleti dispositae, membrana corarauni, sequicrassa, gelatino- 

 sa, hyalina obvolutfe, singulse raembrana propria, rautua pressione 

 cura aliarura cellularum merabranis concreta instructa?. Cellulae 

 omnes chlorophorum singulum, globulura amylaceura, ssepissime 

 vacuola bina contractilia raaculamque rubrara fstignia) pra^bentes, 

 ciliis binis (quorum gratia colonia est continuo rotata et vivido 

 agitata) antice instructse. 



Propagatio bipartitione repetita cellularum [parthenogonidia) 

 nonnullarum (ut plurimura 8) e quibus nova} colonise (colonise fi- 

 liales) oriuntur ciliisque evolutis dein liberae fiunt. 



Generatio (monoica vel proterogyna): Oogonia globoso-ampul- 

 liforraia, magna, oosporas numerosas foventia; antheridia globosa, 

 magna, antherozoidia numerosa fasciculatim congesta, cylindracea, 



