SEGMENTATION OF ARTHROPODS 



few segments which increase as \ve pass from Cambrian to 

 Carboniferous genera. 



The following table shows the segmentation of the body in 

 the Malacostraca, as compared with that of Limulus (cf. p. 203), 

 Insecta, the primitive Myriapod Scolopendrella, and Peripatus. 

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

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

 of segments in Peripatus being very variable in the different 

 species. 



O 



I 



I 3 



I 



c 



I|J5^ r s'H^^|^ r 5'H^'5 



^0HO5-ci-^<M7?"'OOi-^<Mco-^>o 



, 

 Illflllll : 



The appendages of the Crustacea exhibit a wonderful variety 



