SEGMENTATION OF ARTHROPODS 



few segments which increase as we pass from Cambrian to 

 Carboniferous genera. 



The following table shows the segmentation of the body in 

 the Malacostraca, as compared with that oi Limulus (cf p. 263), 

 Insecta, the primitive Myriapod Scolo2oe7idrella, and Perijpatus. 

 It will be seen that the correspondence, though not exact, is 

 very close, especially in the first four columns, the nuniber 

 of segments in Peripatus being very variable in the different 

 species. 



c 

 o 



p-i 

 o 



W 

 H 

 K 

 <J 



a2 

 t> 

 o 



> 



o 



O 

 < 



O 

 H 

 CO 



K 

 t^ 



CJ 

 55 



O 



w 



02 



w 



ca 

 <! 

 H 



The appendages of the Crustacea exhibit a wonderful variety 



