ANIMAL KINGDOM. 281 



surprising; but perhaps on further reflection we shall 

 cease to think this anomalous, and may in some measure 

 even expect that the vital powers of these beings ought to 

 be influenced by the circumstance that Nature in them is 

 leaving one plan of construction in order to adopt another 

 which is totally different. 



M. Savigny divides the Annelides into five orders, three 

 of which are furnished with setiform appendages, the other 

 two being without them. Of these orders the Nereides 

 possess the most complicated structure, as they have a 

 head, antenna? and eyes. Their eyes however are, in M. La- 

 treille's opinion, only to be compared to the rudimentary 

 ecelli visible in Caterpillars and other larvae of insects. 



Swammerdam, Barrelier, and many of the earlier Zoo- 

 logists were so struck with the resemblance which some 

 Annelides, such as the Nereida, bear to the Myriapod 

 Annulosa as to name them Scolopendm marina, or Sec. 

 Centipedes; and M.de Blainville has considered this affinity 

 to be to such a degree natural that in his Tableau Analy- 

 tique des Animaux he places the Setipod Annelides imme- 

 diately after the Myriapoda . Linnseu s even, by m aking the 

 Scolopendra and Juli the last of his insects, and giving 

 them a situation immediately before Vermes, seems to have 

 had a vague idea of the same connexion. The last and 

 in my opinion the most tenable conclusion to which M. La- 

 treille arrives in his report on Savigny's classification 

 of the Annelides is moreover as follows : " Le corps des 

 Annelides appendicees, considere sous le rapport de la dis- 

 tribution et du nombre de ses segmens, sous celui encore 

 des appendices qui leur sont annexes, souvent aussi quant 

 a I'ordre des organes de la respiration, reprtsente en quel- 



