— 2-26 — 



tnn^ulr v. obliqui, bacilli, prismalis e^c. prae se ferunt, li- 

 berae, sessiles v. pf^dunculo simplici v. dichotomo suffultae et 

 disjunclae sunt v. in tieniam, laminnm orbieularem v. angu- 

 losam V. filum moniliforme, fasciculura, globulwm radiosum, 

 stellulam debili v. firmiori negolio eonsocianlur. Gelina in 

 matrieem amorpham, ac deiisior — in fila cellnlifera effi- 

 guralur (Schizonema caet.) ; fila vero eongluLinata frondem 

 heteromorpham, quandoque ovuhgeram (Micromega cact.) ef- 

 formanl. Plures protogeae aborigines, nunc exlinctse, in mas- 

 sas min(rales eonver.s^e — v. in iis latenl. Omnes a CI. 

 Ehrenbcrg, invila nalura, ad Infusoria relilae, a Kiitzin- 

 ^io aliisque nuper reviscC et Algis redditae, sed Meneghini 

 (Sulla animalita delle Diatomee, 1846) Dialomaceas sUiccas 

 ad animalia perlinere, denuo contendit, Apjxiret et in 7r.ini- 

 mis niuxi/nus ille Dens! ncc non S( ena miraeulosa viiae ve- 

 geto-animalis, ovul iriim permanentium. Famiiiae i2 (plures?), 

 genera n\ull;i, specics fcre 1000 nol^e; at in operc Cl. Kii- 

 tzing [D/e /,i'selsch:iii^en Bacillai i n ocl. Dialoineen., 1844) 

 DiaLomareae Silicete iji secliones 7), f.imilias 19 el genera "li. 

 discedunt; lis inleiim de naliira rl orgauisalione illarum ad- 

 huc sub judii'e esL et Naviculae org inisalio alias exponilur 

 ia Schleiden, Grundz. d. wissensc hafll. Bolanih, 18^i6. 



F A >! . 1. D E S ^! I D I N .'E fDesmidiacra? ancior^. 



Cellulae gonidiis viridib. et am^lidiis plenae, poljmorphae: 

 globosae, el ngalae, hemieyclicae v. anguLitae et radialae, so- 

 litariue, gcmiqatae v. plures, iu gIom;ruIum, diseum immedi- 

 nte v. ope membranulse gclineae — aut in catenulas, tubo 

 gclineo incUisas, conjunctae, temnogencsi (v. et gonidiis ef- 

 fusis?) mulliplicandis. Algae nuVroscop., agrioh.\dricae et ma- 

 rinae, pleruinque virides, torpidae fgianulorum apiealium Clo- 

 stcrii motus notabili.s), differunt a setjuenlib. pra^cipue testae 

 siliceae defeelu et saepe c, iis confusae. — Genera: Tessa/fhra., 

 S/Jiierasirum, Closteriam^ Tilinemorus^ Staarastrum^ pCanthi' 



