Bull. U. S. B. F., 1909. 
Plate XU. 
Fig. 2. 
Fig i. — L eft second pereiopod from anterior or upper side, partly dissected to show the relations of muscles and tendons in the 
principal segments; hinges (/?) and nerves (n l and n 2 ) are indicated; and extensor and flexor muscles (ex, H) are numbered 
to correspond to segments of origin. 
Fig. 2. — Shell of right toothed forceps in sectional view from above, to show tendons crossing distal joints. ^ //, lower sliding 
hinge, from inside; mb, interarticular membrane (dotted line marking position of former tendon pocket). 
mb. 
h 
n 
-Ex 
ex j 
„ .h 
1 
h (ball; 
\ 7 L 
' Lfl 
h(cup) 
- e P 
t 
h __ 
t.ex 4 . 
7 t 
t.exl 
tm 
