38 



THE CRUSTACEA 



Fig. -23. 



Trunk-limbs of various Brauc-hiopoda. A, seventli trunk -limb of Jj)«s cancriformis 

 (Notostraca). B, third trunk-limb of Esthcria obliqua CConchostraca). C, fifth trunk-limb of 

 Branchinecta pahidnsa (Anostraca). D, eleventh trunk -limb of l'olyarfc7)iia forciimta 

 (Anostraca). (A after Lankester : B, C, and D after Sars.) hr, braiichia or bract ; fl, 

 ' flabellum ; t, tactile process of the fifth endite in Estheria ; x, proximal exites of the Anostraca ; 

 1-6, the six endites, of wliicli the first is the gnathobase. Between, the flabellum and the 

 sixth endite in A is seen the "sub-apical lobe." Regarding the homology of the plate lettered 

 jl in C and D, see the discussion in the text. 



