TOt5 SWA«X. 



state of suffering-. It is only in thv rold-hlondcd 

 animals tliat we meet witli it to such an uxtcait ; 

 in itl[4^^W!aM->bl4^d^ animal iioioeufs, Mt in a 

 very slight degree. 



Blninpubacli, in liis Manual of Natural His- 

 tory, tluis rneutions tbo n^pniductive power and 

 independent vitality with reference to tlie Am- 

 fklW^^^^'ih^ ^J^mtAhmtj strength ^ tfe 



JibgrntonisMng facility ^vitli which the process 

 is carried on, depend, if I mistake imt. on the 

 great magnitude of their nervx's and the dimi- 

 mHye proporti^ai df fliA htsim Ttief<tfin€P 

 pasrts are, in ^emis^nen^e^ less ^e^i^asftent oti the 

 latter; hence the whok' niachineliaislie^ {^w^s 

 of motion, and disph^ys less sympathy; the 

 mode of existence is more siinj^Ie, and a])- 

 proaches more nearly to that of tlie vegetable 

 wdi»H tfe^ in the warm-blooded classes ; bat, 

 on tlie contrary, the parts possess a greater 

 in(li\ iilual independent vitality. Since, in con- 

 sequenec of this latt^-r endownunt, sTiiiiidi 

 w^hicli operate on one part, or one system, do 

 not immediately g^ffeet the Whole tj^sm hy sym- 

 pathy^ ^ vmmMf^e^ imiixmH^ we are en^ 

 abled to explain the pcculi^ir tenacity of life 

 whifb is disphiyeil umhn* vnrioii;^ circtniistances 

 ill this class — viz. frogs still continue to juuip 



