191) ^l\in'El.S OF POXD-LTFE. 



we advance, and in the liigliest members of the 

 sub-kingdom, the Cephalopoda^ (cuttle-fish,) Ave dis- 

 cover numerous ganglia, co-ordinated and ruled by 

 a large brain, enclosed in what may be termed a 

 tough fleshy skull. 



The Eotifers must be attached to the Articulata, 

 though in what part of that sub-kingdom they should 

 stand is not yet clear. In creatures of this divi- 

 sion we notice some diversities of nervous develop- 

 ment. In crabs, lobsters, etc., there is nothing 

 very intellectual, but they have capacious stomachs, 

 and a large supply of nervous power directed to 

 digestion. In worms and centipedes, in which the 

 segments are extremely numerous, the ganglia are 

 multiplied, chiefly to give each segment its powers 

 as an organ of locomotion, and the relatively small 

 brain is in accordance with the feeble manifestations 

 of intelligence. It is probable that by a sufficiently 

 prolonged and pains-taking observation of such 

 rotifers as the Brachiones, which have large brains, 

 a higher degree of intelligence would be discovered 

 than is usual with the members of the sub-king- 

 dom to which they belong; and if their life of 

 relation should prove more extensive than is usually 

 supposed it would be both a curious and an inter- 

 esting fact. 



Our comparative phrenology, if we may use such 

 a term, is in a very imperfect state: when we come 



