280 



RAMBLES OF A NATURALIST. 



fore, includes only one species ; this unity, apart from all 

 other considerations, having been demonstrated by 

 modern science. 



ANIMAL 

 KINGDOM. 



Two Sub'kingdo 

 r Vertebra ta. 

 \ Invertebrata. 



Four Classes. 



( Mammaha. 

 Sub-kingdom of the J Aves. 



Vertebrata. 



Sub-kingdom of the 

 Invertebrata. 



I Reptilia. 

 |_ Pisces. 



Thi-ee Divisions. 



Articulata. 



Molhisca. 



Radiata. 



Division of 

 Articulata. 



Sub-division of 



True 

 Articulata. 



Two Sub-divisions. 



("True Articulata. 

 \ Vermes. 



Sub-division of 

 Vermes.* 



Five Classes. 



"Insecta 

 jVIyriapoda ■ 

 Arachnida - 

 Crustacea 

 Cirrhopoda - 



Seven Classes. 

 I'Annelida 



Rotifera 

 j Gephyria 

 Lumbricini 

 Hirudinei 

 Turbellaria 

 l_Helrainthes 



Examples. 



Beetles, Butterflies, Flies. 

 Scolopendra, Centipede. 

 Spiders, Scorpions, Mites. 

 Crayfish, Crabs, Wood-lice. 

 Acorn-shells. 



Sabella, Hermella, and al- 

 most all the Marine 

 Worms. 



Rotifer, Hydatina. 



Sipunculus, Echiurus. 



Earth-worm, Nais. 



Leeches, Branchellion. 



Planaria, Nemertes. 



Intestinal worms. 



* In order not to complicate these essentially elementary tables, I 

 have not represented the collateral affinities or analogies, to which I 

 long ago drew attention, and which are now recognised by the most 

 distinguished naturalists. I would here observe that I subdivide 

 the Vermes into two series, characterised by the union of the two 

 sexes in one individual, or by their separation in two individuals. 



