ime) CRUSTACEA CHAP. 
maxillipedes of masticatory functions. Thus in the Decapoda 
the first maxillipede is decidedly foliaceous owing to the expanded 
Fic. 1,—Appendages of Crustacea (A-G) and Trilobita (H). A, First maxillipede of 
Astacus: B, second maxilla of Astacus; ©, second walking-leg of Astacus ; D, 
thoracic limb of Branchipus ; E, first maxillipede of Mysis ; F, first maxillipede of 
Gnathophausia ; G, thoracic limb of Nebalia; H, thoracic limb of Triarthrus. 
bp, Basipodite; br, bract; ep, carpopodite; exp, coxopodite ; cx.s, coxopoditic 
setae ; dp, dactylopodite ; end, endopodite ; ep, epipodite ; ex, exopodite ; 7p, 
ischiopodite ; mp, meropodite ; pp, propodite ; 1-6, the six endites. 
“onathobases” (Fig. 1, A, bp, cap), and the second maxilli- 
pedes are flattened, with their basal joints somewhat expanded 
and furnished with biting hairs; but in the “ Schizopoda ” 
