B -y,- 



Fig. 17. — A^iiicua flnv\af\l\x. — A, one of the podobranehife from the 

 outer side ; B, the same from the inuer side ; C, one of the arthro- 

 branchiifi ; D, a part of one of the coxopoditic setas ; E. extremity of 

 the same seta ; F, extremity of a seta from the base of the podo- 

 branchia ; G, hooked seta of the lamina : (A — C, x 3 ; D — G, highly 

 magnified), h, base of podobranchia ; est, coxopoditic setaj ; c-i-ii, 

 coxopodite : h lamina, pi. plume, and -st, stem of podobranchia ; 

 t, tubercle on the coxopodite, to which the .sft;e are attached. 



