112 



ZOOLOGY 



called because of a certain resemblance to the mantis 

 insect (Fig. 107). This animal is found on our east 

 coast, where it burrows in the sand. It is a little longer 

 than a crayfish. Being hard to catch, it is not much 

 used as food. The Cumacea include a few small marine 

 Crustacea, not ordinarily seen. They are of interest be- 

 cause of the reduced carapace which is transitional to the 

 condition found in 

 the lower Crustacea. 

 The Isopoda 1 include 



FIG. 108. Oniscus, the 

 sow-bug. Dorsal view. 

 Nat. size. Photo, by 

 W. H. C. P. 



FIG. 109. Talorchestia fangicorni*, the 

 beach flea. Nat. size. Photo, by W. H. 

 C. P. 



the sow-bugs or w T ood-lice (Fig. 108), noteworthy for 

 forming the largest group of land Crustacea, and certain 

 marine and fresh-water groups. The Amphipoda 2 are 

 exclusively aquatic creatures, found under decaying 

 vegetation on beaches of lakes or the sea (Fig. 109), and 

 crawling amidst marine hydroids. Being laterally com- 

 pressed, the Amphipods tend to lie on one side when at 

 rest. 



1 ftros, equal ; Trotfs, foot. 



, both ; TTOI/S, foot. 



