

: Kl'is. 



other*, show that in the K<-nu and many other Acrogens the (pore 

 hut tranationnry condiii"!!. whi.-h tv -nit* in tV- pr. .In. ':..n ..!' t\vu 

 seU of cells, by the inii..n of which alone can a new individual be 

 produced. [PLAXTS, BiraODConoi IN.] 



Kxtcrnul portion of an Acrogcnoiu stem. 



Section of item of Alsophila tatila. 



TiMuc of u Acrogenoiu item. 



The following U an analyiiU of the alliances and orders found in the 

 claM of Acrogens, according to the system adopted by Liudley iu hi* 

 Vegetable Kingdom. 1 Thus 



Asexual (?) or flowerless plant*, ArtmcKXs. 



i and leaven distinguishable, .KXS. 



in and leaves indistinguishable. TIIALUK-EXS. 



Alliances of TIIALUKJENS. 



Alyala. Cellular flowerlem plant*, iiomi-h. ! through tli.-ir whole 



surface by the medium in which they vegetate ; living in water, or v . TV 



damp places ; pn>pagated by loospores, coloured spores, or tetraeporea. 



funyala.- Cellular flowerlem plants, nourished through their 



thallus (spawn or mycelium); living in air; propagated by sjiores 



,-..]. .ni-lww or brown, and sometime* enclosed in asci ; dmtitute of 

 green gonidia. 



unJrt. Cellular flnwerlvm plants, nom :-! <! through their 

 wh.'le Hiirfaoe by tlie lue.linni in win. I, thi-y vegetate ; living in nir ; 

 pi-ope^ ores usually enclosed in asci, and always having 



green gonidia in their thallus. 



Katun! Order* of Algala. 



I. IHntnmarnr. Crystalline angular fragmentary bodies, brittle, 

 and ninltii ntimeous aeparnt 



i eta. Vesicular filimentary or membranous bodies, 

 mult iplied by zoos|K>res generated in the interior, at the expense of 

 their green matter. 



:i. i'arnrttr. (Vllular r tubular uiisymmetrical bodies, multipli.-il 

 by simple spores formed externally. 



4. Crramiacffr. Cellular or tubular imsymmetrical bodies multi- 

 plied by tetrupores. 



6. Charaeeoe. Tubular *yniiin fii.-:illy branched bodies, multiplied 

 by spiral-coated nucules filled with starch. 



Natural Orderi of Fungala. 



' l/'/nunomyectri, or Agaricaear.Sforef generally quaternate on 

 distinct sjiorophortx) ; hyiuenium naked. 



7. < "HtcromyecUt, or Lycoperdacetf. Spores generally quaternate 

 on distinct apon>p)i<>ri .- ; livmeuium enclosed in a peridium. 



8. Coniamyccta, or 1'rttlinaceir. Spores single, often septate on 

 more or less distinct sjiurophores ; flocci of the fruit "!- 



mere peduncles. 



'.'. J/i/iilinmyeeta, or Botrytacete. Spores naked, often sc| 

 floccose. 



10. Airmnyerta, or Jfelrelacetf. Sporidia contained (geniT.illy i-ight 

 together) in asci. 



II. 1'h ymm iirrtft, or Mucoracea. Spores surrounded by a venic-ul.tr 

 veil or sporangium ; thallus floccose. 



Natural Orderi of Lichtnaltt. 



12. Graphidacea. Nucleus breaking up into naked spores. 



13. CoUanaetce. Nucleus bearing asci ; thallus homogeneous, gela- 

 tinous, or uurtilogiuouK. 



14. J'armtiiaceir. Nucleus bearing asci ; thallus heterogeneous, 



pulvcnilont, or cellular. 



Alliances of ACROOF.XS. 



Miuralet. Cellular (or vascular) spore-cases immersed or calv]i- 

 trate, i. e. either plunged in the substance of the frond. 

 within a hood, having the same relation to the spores as an involucre 



iliilrt. Vascular; spore-cases axillary or radical, om- or 

 many-cflloil ; ^jx ires of two sorts. 



nlor; spore-cases marginal or dorsiil, one-ci lh il, 

 <mually surrounded by an elastic ring ; spores of but one sort. 



Natural Orderi of Muscat a. 

 1. Ifrpaticce. 



15. Hicciacea. Spore-cases valvelecs, without opcrculum or ! 



16. J/HI-- hiiiiiiitcea. Spore-cases valvelvss, or bun>tiug invgiilnrly, 

 without ojHTrnlum, lint with clatcrs. 



17. ./ iacea. Spore-cases opening by a definite number 

 of ei|ii:il valves, without operculuui, but with elatera. 



18. / -Spore-cases peltate, splitting ou one side, without 

 him, and with an clater to every spore. 



2. J/IMCI. 



19. Andraactas. Spore-cases opening by valves, with an operculum, 

 without elaters. 



20. liryaccit. Spore-cases valveleos, with an operculunj, without 



.-!. it. H 



.\:i'nral Ihdert of Liicojwdala. 



'2f f.i/rn/, - j lore-cases one- to three-celled, axillarj'. ' 



ductive bodies similar. 



22. Manileacvf. Spore-oases many-celled, radical (or axillary), 

 bodies disxiinilar. 



al Orderi of Filicala. 



23. Ophioylottacea. Spora-cases ruigless, distinct, two-valved ; 



'ii tlie margin of a contracted leaf. 



M / r. Spore-cases ringed, dorsal or marginal, <li 



ilittiiiK irregularly. 

 J.V l>n,,n acett. Spore-cases ringless, dorsal, connate, splitting 



rly by ii v.'litr.il 



(l.inilley'ii \'r<i-'lnlili Kin ; /iluin ; Schlei.i 

 i'\ hr. Lankesttr; II- 

 it the Twent\ I 



\i U.K. \ATlirs. u genus of fossil Cycloid fishes, found in the 

 chalk of SIIHWX. (Aga> 



ACUD'I.KI'IS. , fossil Ganoid fishes, found in the mag- 



ncsian limestone of Durham. (Agasoz.) 



