Jo ANIMALCULA OF INFUSIONS. 1 79 



The degradation in the organic ftrufture of ani- 

 mals is alfo vifible in their operations. Thefe, in 

 many fpecies, nearly approach to thofe of man. 

 Such are the operations of quadrupeds in gene- 

 ral ; but more elpecially of the elephant, ape^ 

 and beaver. Thofe of birds, likewife, bear much 

 analogy to ours : their ingenuity in conftrufting 

 nefts ; the diverfity of note to exprefs the vari- 

 ous affedlions of hatred, fear, pleafure and pain ; 

 the provident fagacity of many, in changing their 

 climate according to the change of feafons ; the 

 facility of inflruding birds of prey for the chace : 

 M 2 all 



brain, Entomologia Syfienrntica, Tom. I. In one treatife, 

 the great comparative anatomiu Cuvier affirms, they have 

 no brain properly fo called, but only a fpinal marrowj 

 fwelling into knots and tubercles at intervals, from which 

 the nerves proceed, Tableau de Uhijhire Naturells des AnU 

 niaux. However, in his late work on Comparative Ana- 

 tomy, he defcribes the brain of many infedts divided into 

 two lobes, and fending forth nerves. The nervous fyflem 

 of the various genera of worms is much more obfcure. 

 According to Virey, Cuvier, and others, they have no 

 brain, but ganglia on a nervous cord. The latter re- 

 marks, * Ganglia nearly equal being uniformly diftributed 



* on a cord, extending through the v.iiole length of the 



* body, feeras defigned to furnifh each fegment with a. 



* brain peculiar to itfelf.' Neither brain nor nerves have 

 yet been difcovered in the aftinise, medufae, polypi, and 

 m^xir more.— =T. 



