THE CRAYFISH 121 



that the exopodite is relatively larger, and in the endopodite it 

 is the meropodite which is the longest joint, not the ischio- 

 podite. In the first maxilliped the same essential structures 



Fig. 27 



VIII. Third maxilliped of the right side, seen from behind, cx.p, coxopodite ; 

 b.p^ basipodite ; ex.p, exopodite ; en.p, endopodite; i.p, ischiopodite ; in.p, mero- 

 podite ; c.pi carpopodite ',p.p, propodite ; d.p^ dactylopodite ; e.p, epipodite bear- 

 ing branchial filaments ; J, coxopoditic setae. /'//. Second maxilliped ; lettering 

 as in VIII. VIII. First maxilliped. e.p, the membranous epipodite. V. The 

 second paxilla. / and 2, the two lobes of the coxopodite ; 3, 4, the two lobes of 

 the basipodite ; 5, the endopodite ; 6, the exopodite, (These figures should be 

 compared with the similar numerals on the abdominal limb of Apus, fig. 22.) 

 scp, scaphognathite. IV, The first maxilla. ///. The mandible with its palp. 



can be distinguished, but the proportions and relative size of 

 the parts are very much altered. The coxopodite and basi- 



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