Natural classes. 69 



88. Ceraniidia. Ceramium, 

 Char a. 



89. Fucidia, Ulva. 



90. Stereopsia, Spongia. 

 Such then are now the Natural Orders to the 



best of our actual knowledge ; but each includes 

 from I to 10 families or secondary groups quite 

 as natural ; each family from 1 to 50 genera ; 

 each Genus from 1 to 50 species, seldom more : 

 those of 100 or 200 species are small natural 

 families. Such are Carex, Erica, Euphorbia^ 

 Vaccinium, Salix, Aster, Polygonum ^c. long 

 ago properly divided by myself or others: like 

 Conferva, Lichen, Agaricus, Cactus ^c. now 

 become families, orders or even classes ! 



But this Serial Order interrupts or conceals 

 many mutual affinities, since they are not akin 

 to the two Orders only, before and after in the 

 series ; but also to many removed in the series* 

 Thus the following are closely allied altho' far 

 removed, as Nations may have colonies or be 

 allied altho' distant on the Earth. 



The Gynopolia and Polachenia 70. 

 Cactides 48 with Idiogyna 59. 

 Gynaridia 40 with Synodia 57. 

 Dapsilitia 47 with Vaccinidia 56. 

 Darinia 34 with Peritalia or Bicornes 55. 

 Isandria 11 with Adelphidia 19. 

 Axanthia 7 with Emprotia 72 &.c. — And 

 whenever a natural table or map or the whole 

 will be given, they must be approximated or 

 connected by some means. 



Various modes may be devised to elucidate 

 these affinities. 



1. A botanical map on a graphical plan would 

 best represent them by contiguity ; a second 

 mode would be by a kind of net work, 3d by a 



