OF ARTHROPODS 
SEGMENTATION 
The following table shows the segmentation of the body in 
the Malacostraca, as compared with that of Limulus (cf. p. 263), 
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 
Insecta, the primitive Myriapod Scolopendrella, and Peripatus. 
species. 
few segments which increase as we pass from Cambrian to 
Carboniferous genera. 
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