APPENDAGES OF CLADOCERA 



In the Sididae there are six pairs of thoracic limbs, which are 

 nearly alike in the female ; in the Bosminidae there are six pairs, 

 the first two modified for prehension, the last much reduced. 



Mr. 



&TU. 



C D 



FIG. 12. Thoracic limbs of female Simocephalus vetulus. A, The first ; B, the second ; 

 C, the third ; D, the fifth. Br, Bract ; Ep, epipodite ; Ex, exopodite ; Gn, 

 gnathobase. 



In the male, the first thoracic limb is usually provided with 

 a long sensory process and a prehensible hook (Figs. 11, 19). 

 In the Gymnomera the limbs are cylindrical, jointed rods, 



