ButL. U. S. B. F., 1909. 



Plate XL 



Skin 



n(2)- 



fl£. 



6 -' 



Left crusher claw of lobster, partly dissected from upper side, to show relations of muscles, nerves, blood vessels, and skin, with 

 principal branches of claw arteries and nerves laid bare, art, large artery which supplies both muscles of claw, and breaks 

 into a regular system of branches in fine meat of tips; n (j), n (2), posterior and anterior nerve trunks supplying, respectively, 

 the extensor {Ex^) and thumb, and the flexor ifl^) and index. 



