Fig. LVI. ^ C. (Siphonoslra) spinifeia n. sp., ?. — 19. Fir.st endite of the protopodito of the fiftli limb; 480 X. 

 20. Second onditn of the protopodite of the fifth limb; 'i80 X. 21. Third endile of the protopodite of the fifth limb: 

 480 X. 22. The main tooth of the first exopodite joint of the fifth limb and thi> adjacent bristles; 480 X. 23. The 

 distal exopodite joints of the right fifth limb, seen from in front; the pectination is not drawn on one of the posterior 

 l)-bristles; 480 X. 24. Left sixth limb, seen from outside; 312 X. 



