96 Contervoideae, Ulvace;^. 



vel irregulariter dispositis, 20-38 j.. (iiain., inaturis vivide fuscG' 

 scentibus, nec miniatis. In aquis pr. a Freiburg n in Brisgovia (A. 

 Bkaun). — Var. crassisepta Ileinr. in Bericht. deutsch. bot. Ges. 

 1884, I, p. 450: septis crassis, quorum ia medio crebro coni vel 

 colliculi promineat; ssepius et aliis locis in cellula annuli aut coai 

 aut striae cellulosae inateriae excrescuat,- filameata facile articu- 

 latim dilabuntur quo modo egregia vegetativa propagatio evenit. 

 In locis inundatis prope u Gratz )) Styri«(LEiTGEB). 



Familia VI. ULVACEiE (Lamour.) Rabenh. 



Ulvaceoe Lamour. [1813] in Aan. du Museum XX, p. 275 em. Rabenh. [1868], 

 Fl. Eur. Algar. III, p. 307, .1. Ag. Till Algernes Systematik. VI, 1883 excl. 

 parte, Ardiss. Phyc. Medit. II, p. 185, Hansg. Prodr. Algeafl. voa Bohmea 

 p, 53, De-Toai e Levi Fl. Alg. Vea. III, p. 182, Hauck Meeresalgen p. 422, 

 Wolle Freshw. Alg. U. S. p. 106, Cooke Brit. Freshw. Alg. p. 128. 



Vlvacece, Phycoserideie^ Enteroynorxihece Kuetz. Pliyc. p. 294, Species Alga- 

 rum p. 471. 



Thallus membraaaceus, foliaceus, fequalis vel crispatus, rarius tu- 

 bulosus plus minusve intestiniformibus, teres v. subcompressus, mono- 

 vel di-stromaticus; cellulis thallum constituentes nniaucleat», inem- 

 brana crassiuscula, sa^pe stratosa praeditaj. Chlorophora laminaria, pa- 

 rietem celluharum fere induentia. 



Propagatio zoogonidiis neutris (ii. e. inter se non copulantibus), 

 acinetis, et cellulis immobilibus e cellularum singularum divisione or- 

 tis coloniasque Protococci- vel Palmelliformes gignentibus. 



Geaeratio ') zoogonidiis, e celluhirum contentu evolutis, copulan- 



1) Quod ad Ulvacearum phaeaonriena generatioais et propagatioais aec aon 

 sexualitatem attiaet, cfr. praecipue Areschoug Observatioaes phj^cologicae II 

 uec aoa De copulatioae microzoosporaruai Eateromorphix) compressae, Jaacze- 

 wski et llostafiaski Observatioas sur quelqiies Algues possedaat des zoospo- 

 res dimorphcs, Reiake Ueber Moaostroma bullosuin uad Tetraspora lubrica, 

 Boraet ct Thuret Notes Algologiques fasc. II, Borzi Studi Algologici fasc. I, etc. 

 Zoosporas Ulvaccaruin prinjum detexit et illustravit cl. Tlmret (Aaa. Scieac. 

 Nat. 3 serie, toia. XIV [1850], p. 224, pl. 20), qui errorc iaductus eas dupli- 

 cis formui admisit, uaas majores 4-ciliatas (macrozoosporas), alteras miaores 

 2-cili;itas (microzoosporas); zoo.sporae vero utriusque forma) suat biciliat;i3 ot 

 magaitudiae taiitum dilferuat. Sec. cl. Borzi Studi Algologici I, p. G ct seq. 

 qui observationes in ULvam Lactucam fecit, zoospora3 utriusque forraoB re- 

 vcra biciliataj partim inter se lateraliter copulaates zygota 4-ciliata et 2- 

 aucieata (macrozoosporas Thur.) geacraat, partim (observaato cl. Bornet in 

 Monostromalc Wif/roc/<ii) siae eopulatioao directe gorminant (propagatio), 



