330 STUDIES OF NATURE. 



the fame odour when burnt ; that they do not re- 

 fpire by the mouth, but by the fides, infeds by the 

 trachea, fidies by the gills ; that they have no au- 

 ditory organ, but hear by means of the nervous 

 impreffion made on their bodies by the commo- 

 tion of the fluid element in which they live j that 

 they fee all round the horizon from the difpofition 

 of their eyes i that they equally run to the light; 

 that they difcover the fame avidity, and are, for 

 the moft part, carnivorous ; that, in both genera, 

 the female is larger than the male; that thefe 

 throw out their eggs, to an infinite number, with- 

 out fitting on them : that mod fifties pafs, on their 

 birth, through the ftate of infers, ifTuing frcm 

 their eggs, in form of worms, and even feme in 

 that of frogs, fuch as a fpecies of fiOi in Surinam ; 

 that both are cafed in fcales ; that many fifhes are 

 provided with beards and horns, like infeds; that 

 both the one and the other contain, in their cate- 

 gories, an incredible variety of forms, peculiar to 

 themfelves ; finally, that their conftitutions, their 

 metamorphofes, their manners, their fecundity, be- 

 ing the fame, there is a powerful temptation to 

 afcribe to thefe two numerous clafTes, the fame in- 

 fenfibility. 



As to animals which have blood, let Malle^ 

 branche fay what he pleafes, they are fenfible. They 

 exprefs a fenfe of pain by the fame figns which we 



do. 



