SEGMENTATION OF ARTHROPODS 



lew segments which increase as we pass from Cambrian to 

 Carboniferous genera. 



The following tal)le shows the segmentation of the body in 

 the Malacostraca, as compared with that of Livivlus (cf. p. 2 Go), 

 Insecta, the primitive Myriapod Scolopendrel/a, and Pcripatvs. 

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

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

 of segments in Feriixdus being very variable in the different 

 species. 



o 



Ph 



o 



Eh 

 P5 



o 



< 



c 

 o 



I— ( 



<1 



H 



w 



w 



GO 



W 

 K 

 H 



O 



:?; 

 I— I 



o 





The appendages of the Crustacea exhibit a wonderful variety 



