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 S tru c tu ra   frondis : 
 Areschougice  122,  129.  
 Balìice  lÒl. 
 Callithamnii  100. 
 Catenella  113,  117. 
 Ceramii  102. 
 'Champice  112,  117. 
 Chondri  115. 
 Chrysymenioe  114. 
 Crouaniæ  100. 
 Cryptonemiæ  114,  120.  
 Delesseriæ  110. 
 Dudresnajæ  127,  129.  
 Dumontioe  114. 
 Farlo'wiæ  113. 
 Furcellariæ  112,  113.  
 Gelida  127. 
 Gelinarioe  113. 
 Gigartinæ  115. 
 Gloiopjhleoe  125. 
 Gloiosaccii  114.  
 Graieloupiioe  115.  
 Halymenioe  114.  
 Helminthocladiacearum  124  
 Helminthoræ  125,  129.  
 Jeannerettiæ  106. 
 Irideæ  115. 
 Lomentariæ  112,  117.  
 Nemalionis  114,  127.  
 Nemastomæ  113,  114.  
 N ito p h y lli  107. 
 Nizymeniæ  123.  
 Pachymeniæ  113.  
 Pliacelocarpi  123.  
 Polycoeliæ  93,  124,  129.  
 Polyopis  113.  
 Polysiphoniæ  105.  
 P rionitis  115,  120.  
 Bhabdoniæ  116.  
 Bhodoglossum  115.  
 Ehodomelearum  106.  
 BhodophyUidis  109.  
 BissoeUoe  115.  
 Sarcophyllis  113.  
 Schimmelmanniæ  115.  
 Schizymenioe  113,  124.  
 Scinaiæ  112,  128.  
 Stenocladice  120,  129.  
 Wrangeliearum  100.  
 Su b stan tia   44,  46.  
 alia  in  aliis  46.  
 in te rc e llu la ris  59.  
 m u ta ta   in  eadem  48,  66.  
 Tela  accessoria  132.  
 pla c en ta ris  134.  
 prim a ria   131.  
 tra n s ito r ia   133.  
 Tetraoliocarpium  156.  
 T e tra sp o ra   135,  156. 
 Thallus  5. 
 Trichogyne  177,  282.  
 T richomata  102,  103. 
 II.  Genera  et  Species. 
 Acropeltis. 
 maculæ  nemathcciosæ  163.  
 elata  31.  
 pliylìophora  114. 
 Acro ty lu s 
 cystocarpia  249,  250.  
 s tra tum   circumnucìeare  170. 
 Æode s  195. 
 A h n fe ltia 
 cystocarpium  203.  
 sporocarpium  164. 
 Amansia  1,  5,  90. 
 Arescliougia  242,  249.  
 cy stocarpia  219.  
 fila  hyphæformia  27,  129.  
 p la c en ta   75. 
 stra tum   c ircumnucìeare  175.  
 s tru c tu ra   122.  
 ligulata  219.  
 sedoides  33. 
 Areschougieæ  
 cystocarpia  219.  
 evolutio  nuclei  172,  229,  230.  
 p la c en ta   174. 
 B a llia   caìlitricha 
 fila  d e c u rre n tia   80,  101.  
 formatio  cellular.  80.  
 p o ri  72,  76.  
 rami  d iv e rsi  60,  103.  
 ramificatio  18,  41,  83.  
 sphærosporæ  161. 
 B a n g ia   9. 
 B in d e ra   249. 
 Bonnemaisonia  V ii.  
 an th e rid ia   143.  
 folia  40. 
 Callitlmnmion  9,  98,  280. 
 ad p a ra tu s  trichoplioricus  177.  
 a n th e rid ia   145.  
 favella  182. 
 favellæ  in itia   181,  186,  189.  
 favellæ  lobi  184.  
 fructificationis  organ,  abnormia  
 190.  
 gemmæ  21. 
 o-emmidiorum  cellulæ  m a te rnæ   
 184,  185.  
 radioes  aquaticæ  24,  25,  26,  100,  
 188. 
 in tra  membranam desoendentes  
 26,  27,  100.  
 ramificatio  17,  83,  85.  
 rami  aculeati  60. 
 „  ad v en titii  85. 
 „  div e rsi  41,  100. 
 „  normales  84.  
 sphærosporæ  161. 
 ,,  compositæ 157,191.  
 stra tum   cu ticu la re   52.  
 s tru c tu ra   98,  100.  
 amcricanum  183.  
 australe  17.  
 baccatuni  17,  24,  85. 
 Bo rre ri  25,  145. 
 Byssoides  191.  
 calearatum  25.  
 comosum  27.  
 corymbosum  145,  178.  
 cruciatum  17,  181,  185,  186.  
 dimorphum  18. 
 18. 
 194. 
 fru ticu lo sum   191. 
 Furcellariæ  28.  
 gracilentum  18.  
 gracillimum  25,  179,  188.  
 g ra n u la tum   145,  178. 
 Hooheri  191. 
 L a ric in um   191.  
 plumula  18,  145.  
 polyspermum  187.