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 Gigartina  
 organa  fructificationis  175,  176.  
 sori  165. 
 s tru c tu ra   73,  115.  
 acicularis  116.  
 circumcincta  175.  
 radula  10. 
 Gigartineoe  251.  
 nuclei  195. 
 stra tum   ciroumnuolearo  175. 
 Glüiûpeltis  46. 
 Gloiophlæa  
 cystocarpia  245,  246,  247,  248.  
 s tru c tu ra   125,  129. 
 Gloiosaccion  4.  
 cystocarpia  221.  
 s tru c tu ra   114,  115. 
 Gloiosiphonia  V il.  
 cystocarpia  197,  200.  
 fila  hyphæformia  200. 
 Gungylospermeæ  21. 
 Gracilaria  6,  63,  66,  130,  171,  174,  
 231,  242.  
 cystocarpia  232.  
 confercoides  232.  
 coronopifülia  13. 
 Grateloupia  46,  115.  
 cystocarpia  196,  201.  
 fila  hyphæformia  200.  
 p in n a ta   116,  202.  
 p ro life ra   116,  201. 
 G riffithsia  65.  
 ad p a ra t.  trichoplioricus  177,  181.  
 an th e rid ia   145,  147.  
 a rticu li  in itia   85.  
 favella  182,  183,  189.  
 organor.  fru c t.  in itia   96,  97.  
 sphærosporæ  159,  161.  
 ia rh a ta   161. 
 eorallina  64,  161,  183,  189.  
 F q u ise tifo lia  182.  
 opuntioides  161.  
 phyllamphora  161.  
 setacea  76,  161,  183.  
 sphærica  145. 
 Gymnogongrus  203,  204,  208.  
 sporocarpium  164. 
 Halarachnion  114. 
 Ila lo d ic tyo n   7. 
 Haloplegma  7. 
 Halosaccion  12. 
 Halothamnion  157. 
 Haiymenia  6,  12,  65. 
 adparatus  trichoxihoricus  180.  
 nuclei  170,  198.  
 s tru c tu ra   114,  115.  
 elongata  115. 
 F loresia  198. 
 Haiymenia  
 ligulata  197,  198.  
 spathulata  115. 
 Hanovia  7. 
 Helminthocladiaceæ  1.  
 cystocarpia  244.  
 s tru c tu ra   27,  60,  124. 
 Helminthora  177,  180.  
 cystocarpia  245,  246,  247,  248.  
 s tru c tu ra   125. 
 Hemineura  32,  240,  243. 
 Heringia  28,  242.  
 cystocarpia  230,  238. 
 Herpothamnion  146. 
 Horea  227. 
 Halymenioides  8. 
 Hormospermeæ.  58,  171,  172,  173. 
 HydroiapatJmm  29,  221. 
 Hymenocìadia  162.  
 cystocarpia  223.  
 lanceolata  162. 
 Hypnea  6,  13,  14,  171,  254,  258.  
 cystocarpia  255.  
 fila  cu ticu la ria   62.  
 rami  sp hæ rosporiferi  162.  
 cornuta  14. 
 episcopalis  13,  14,  163.  
 hórrida  12.  
 nidifica  13.  
 pannosa  12.  
 setioulosa  62,  68,  255. 
 Hypneaceæ  244,  254. 
 Ja n ia  28. 
 Jeannerettia  108.  
 venæ  89,  92. 
 Ir idoe a   6,  10,  11,  46,  115,  203,  204.  
 cystocarpia  175.  
 sori  165.  
 cordata  7,  10.  
 membranacea  106,  108,  130. 
 K a llym e n ia  10,  15,  70.  
 cribrosa  6.  
 p e rforata  6.  
 rosacea  13. 
 L am in a r ia   11,  16. 
 L aurenc ia  9,  66,  274.  
 an th e rid ia   142,  151.  
 tric h om a ta   103.  
 elata  32.  
 lu x u r ia n s  33.  
 obtusa  143. 
 p in n a tifid a   103,  142,  151.  
 tenuissima  147. 
 L e jo lisia  146,  178,  179,  181,  274. 
 Lenormandia  90.  
 linearis  269. 
 Lep to p h y llis  (sori)  165. 
 Lessonia  15. 
 Ijeoeillea  17,  21,  37. 
 rad ix   24,  26. 
 L omentaria  112,  117.  
 cystocarpia  267. 
 K a lifo rm is  118. 
 Lychæte  78. 
 L yg iste s  60,  197,  200. 
 Macrocystis  16,  35. 
 M a rg in a ría   11. 
 Murtensia  7,  12,  130,  176.  
 Melanthalia  22,  164. 
 Melanthalieoe  
 cystocarpia  233. 
 Meristotheea  287.  
 cy stocarpia  259,  260.  
 papulosa  260. 
 Mieroeladia  Coulteri  130.  
 hlicrocoelia  205. 
 Monospora  287. 
 Mychodea  256,  258.  
 hamata  14.  
 membranacea  103. 
 Nemalion  48,  177.  
 cystocarpia  245,  246.  
 s tru c tu ra   114,  127. 
 Nemastoma  46,  60,  113,  114.  
 cystocarjna  197.  
 cervicornis  197.  
 lanceolata  113.  
 m arginifera  198. 
 Nematospermece  58,  229.  
 N ito p h y lh im   9,  29,  32,  86,  98,  107,  
 108,  135,  171,  280.  
 a n th e rid ia   144,  147,  148.  
 cellularum  format.  79,  80,81,107.  
 cystocarpia  240.  
 s tru c tu ra   108,  109. 
 Bonnemaisoni  108.  
 denticulatum  241. 
 G unnianum  144. 
 H arveyanum  108.  
 litteratum  108.  
 ocellatum  107.  
 p unctatum  10. 
 N iz ym en ia   123,  233. 
 cystocarpia  234. 
 Nizzophloea  210. 
 cystocarpia  213. 
 Nostochineæ  2,  49,  50. 
 Ochtodes  
 cystocarpia  225. 
 Odonthalia  141. 
 Oscillatorieoe  50. 
 Pachymenia  
 fructus  195.  
 ramificatio  15.  
 s tru c tu ra   113. 
 Pandorea 
 cellulæ  fructiferæ  formantur  78,  
 96. 
 sphærosporæ  161. 
 PcyssonelUa  
 an th e rid ia   145.  
 caulis  formatur  31.  
 frondis  s tr a ta   99.  
 h abitus  130. 
 Phacelocarpus  27,  176,  230.  
 cystocarpia  233.  
 folia  40.  
 h abitus  6.  
 rami  40. 
 sporocarpium  163.  
 s tru c tu ra   123,  59.  
 complanatus  40. 
 Phyllophora  
 caulis  29.  
 cystocarpium  203.  
 sporocarpium  164.  
 in te rru p ta   13. 
 membranifolia (monoica) 135, 278.  
 F hyllospora  11. 
 Pilcea  210. 
 cystocarpia  212. 
 Placophora  
 a n th e rid ia   141. 
 Plocamium  
 a rticu li  79,  
 caulis  o ritn r  34.  
 in itia   loborum  nuclei  222.  
 cystocarpia  a  ramulo  tran sfo r-  
 formata  176.  
 organa fru c tife ra  in  diversis locis  
 frondis  176.  
 hamatum  35. 
 Mertensii  11. 
 Preissianum  20,  33. 
 P ollex fenia  pediceìlata  32,  270. 
 Polycoelia  
 cy stocarpia  94,  205,  206.  
 fila  hyphæformia  124.  
 sphærosporæ  compositæ  157.  
 s tru c tu ra   93. 
 Polyides  225.  
 cystocarpia  262.  
 nucleus  176,  263,  265.  
 spongiolæ  262,  264. 
 Polyopes  
 cystocarpia  195.  
 nuclei  in itia   200.  
 stru c tu ra   113. 
 Folysiphonia  5.  
 an th e rid ia   137,  138.  
 cellulæ  in te r s titia le s   88,  92.