BACILLARIE^ Nitzsch. 



Bacitlariece Nitzsch [1817] Beitrage zur Infusorienkunde oder Naturbeschrei- 

 bung der Zerkarien und Bacillarien. Cfr. Lagerstedt in Botan. Notiser [1876] 

 pag. 1, Pfitzer [1871] Untersuch. et [1882] in Schenk Handbuch der Bota- 

 nik, 2, p. 403, De-Toni [1890] Osserv. Bacill. pag. 890, Lanzi [1890] Sagg. 

 pag. 1 et seq. 



Diatomideoe Gray [1821] Arrang. of Br. planjts I, p. 293. 



Diatomeoe Dumort. [1822] Comment. bot. p. 71, C. Ag. [1824] Syst. pag. XII, 

 1 p. m. p. 



Diatomacece C. Ag. [1830] Consp. Diat. p. 1. 



Diatomophgcece Rabenh. [1864] Fl. Eur. algar. I, p. 1. 



Algre brunnese, endochroma e chlorophyllo genuino atque pi- 

 gmento peculiari brunneo (diatomina, phycoxanthina) ') consociatis 

 constitutum foventes; endochroma in corpora definite limitata (phseo- 

 phora) typice dispositum, guttis oleosis subinde commixtum. 



Thallus minutissimus 2 ), typice unicellularis 3 ); membrana cellu- 

 laris silicifera 4 ), e partibus duabus (valvis s. a.) inter se discretis, 

 una majori alteram minorem per cingulura connectivalem amplecten- 

 te composita 5 ). 



Multiplicatio tum asexualis tum sexualis: asexualis (propagatio) 

 sive bipartitione cellularura secus axin longitudinalsra 6 ) sive per spo- 



1) Cfr. Kuetzing, Die kieselschaligen Bacillarien, 1844, p. 22; — Naegeli, 

 Gatt. einzell. Alg. 1849, p. 8; — Askenasy in Botan. Zeitung 1867, p. 235; — 

 Kraus et Millardet, Mem. Soc. sc. nat. de Strassburg 1866-70; — Nebelung 

 in Botan. Zeitung 1878, p. 394 etc. 



2) Nonnullte Bacillarieae oculo nudo visibiles sunt ex. gr. Nitzschia specta- 

 bilis W. Sm. — Nitzschia scalaris W. Sm. — Coscinodiscus Gazellce Grun. 

 (Ethmodiscus gigas Castr.). — Thalassiothrix lonaissima Cleve et Grun. 



3) Adsunt saepe individua plurima catenulatim conjuncta, muco coalitaetc. 

 Individua libera plerumque motum characteristicum ostendunt, de quo aucto- 

 res nonnulli e. gr. Schultze, Mereschkowski, Pfltzer, O. Mueller etc. obser- 

 vationes retulerunt. 



4) Substantia silicea nonnumquam parcissime adest, ut in Rhizosoleniis. 



5) Valvas s. s. nuncupo superflcies frustuli e fronte visibiles (Nebenseite 

 auct. germ. vet.), sculpturas ostendentes; zonas (seu facies) connectivales 

 vero partes laterales e latere visibiles plerumque sculpturis carentes per 

 quas valvae (aequitandi modo) amplectuntur (Hauptseite auct. germ. vet.j. 



6) Pro unaquaque celluhe matricalis divisione, cellulae flliales (individua 

 nova) sensim sensimque minores flunt, usquedum auxosporye generantur per 

 quas individua majora (typica) oriuntur. 



