§ VIII. COLLECTION OF ARTICULATED 

 ANIMALS ; 



COMPREHENDING THE CRUSTACEA, THE ARACHNIDES, THE 

 INSECTS, THE ANNELIDES AND THE WORMS. 



The animal kingdom naturally forms two great 

 divisions : that of the animals with vertebrae, 

 which have an interior skeleton, and that of the 

 animals without vertebrae. The collections which 

 we have hitherto seen consist of animals be- 

 longing to the first division, and those which we 

 have yet to see are comprised in the second. In 

 order to facilitate our examination, we shall di- 

 vide them into only two sections, the articulated, 

 and the non-articulated. As they both compre- 

 hend animals of a small size, they have been 

 placed in cases which occupy the centre of the 

 gallery on the second floor. 



The collection of articulated animals, of which 

 we have about twenty-five thousand species, is 

 divided into five classes, which we shall exa- 

 mine successively. Its existence may be dated 

 from the new organization of the Museum ; for 



