12 ,T. g: Atrardh. 



f(Ufp altcro modo stint S|ili;f>ros])oril'fi-;i', liis polius cliaracloristicuin dixisst'in Sphi^ro- 

 s|io)-a,s (>s.se iu Séries Iriuisvoi'.sales (lis})osi(a,s; rêvera in eodein gciiieiilo |»liire.s ejii.s- 

 iiiodi Sei'ies transversales obvenii-e iiunc vidi, (|ua.rum uiiain seriem iul'ra., alleraiu 

 sii[)ra, dissepimentuin, (|Uod ipsos articules vicinos se[)arat, disi)ositam sic\)v vidi. 



Si liis indicatis cliaracteribus quoque insistere liccat, secjui putarein, (|uo(|iie 

 iiiliji Sei'ies, quas supi'a designavi, certum dispositioiiis ordinem assiimeuduni esse. 



Coiiiparanti deiiiijue ipsaiii strueturani geiiiculoruui, ad[)aruit iiiilii haiic iu di^ 

 versis Speciebus obvcnire adiuodum diversain, et quoad foriiiaiu eellularuui. qiiibus 

 ïonnantur genicula, et (]uoad modum, (juo eellula; ista? propiio Diodo disposita; ob- 

 veniaiit, aut in <{uem ])lus minus conspieue tendentes adpareant. Exstant Species 

 extei'uo habitu rêvera sat siniiles, at (pioad sti'uetuj'ani geniculoruni conspieue invi- 

 cein diversa'. Ejusmodi diversitatem structurée iu S})eciebus verc aflinibus existere 

 posse, id assuniere negareni. (iuuui contra observaverim eandeni geniculoruni 

 structuraui in Speciebus, quas bcne divcvsas considcrarunt, assumere non dubitavi 

 [)lures diverses existere ty[)Os, structura geniculoruni indicat(.)s; intra (|uos Siiecies, 

 a,liis cliaracteribus distinctas, plus minus mmieresas dignoscere opportci'el. liis 

 structura' dilïerentiis insistens, Tribus nuuierosas cliaracteribus circuniscribere ])osse 

 credidi, (|uil)us adjuvantibus species Cerauiiorum numeresas certius dignoscere 

 liccre speravi. 



(^uod Ti'ibus mniierosas projtriis miminilius designavi, iil connnodum judicavi, 

 ulpote liis nominilius utens ipsos clia,racteres Tribuum jiluribus loeis repet(!re evi- 

 larem; (piod dictum \'o]ui. ne milii impntaretur, divisionem (jnandam (ienei-is a, me 

 molitam iiiisse. 



Clavis dispositionis Specierum Ceramii. 



Skkiks 1;.\. Im tik'LIM a. <u'iiiculis cNtcriurt' lalcrc l'uiiiDniin rcrtililms, s|ibii;iiis|iiiras ^'lllls('<•l^l 

 (Isitini ilispiisitiis jrcicntibiis ; :>|)liaTnsi)()ris iii sicnicnlo aiil sinj::ulis, aut [ilurilHis in liciui 

 cycluni <lis|)(isitis, miiu- i'eiv toiis ciuersis, iiiiru- irnincrsis aut in glonitM'ulo cx'Ilulo,sii i|uasi 

 ex gcnirulo fi'lluente, geiieratis: 



Tin IMS J. ClI.KKOCiOMA ; 'iKines FI. STEXO(i(JXIA : 



1. Ccr. iiiacilentuni .1. Ag. lust-r. t. Ccr. tastigiaUiiii llarv. 



'2. Ccr. raïuillo.suiu llaiv. 5. Ccr. australe Sdiul. 



i). Ccr. subtile J. Ag. (i. Cer. coryinbosum .J. Al', 



■riniiis IJl. G(>N(;Yi,o(i()M.\: '' ■ <■>'■• Cliltoiiianuiu .1. A-. 



s. ('er. tt'iuiissiimiiu l/b. 



Tkiijus I\'. Sp.\k(;.\N()(;onj.\: 



!). C'er. |iuli(,'iuhiiii Sinnl. 10. ('or. ecliionotuiii J. .Vg. 



SKiiiKS II. DiciiocTJNi.v geniculis in IVniKlf siibilisticiia ad iitrnnuiur subniaruiiicin Icrlililnis, 

 sjjha'rosporas (|iuisi inarjiinibiis inniR'rsas goiu-raiililius ; S|iii;fr<is|H)ris aut utrimiiu' singiilis, 

 aut plnribus in bcMnicycliini ilis|piisil,is — iiunc iina vel altéra intra cellulas paginales l'or- 

 uiatis veiiii-illuin mentientilius. 



SplKcrospora' in his (juasi in eerta, parte tronilis plaiiatu' aut (listiche ra-niosa' generantur, 

 in Séries uiargiiiales ntriiu|ne singulas eDiijuiictie. Celluhe pra^guantes iiiuiiruiii in (piociue articulo 



