THE BRANCHIOPODA 



In jthe former the appendages of the genital somite (the eleventh 

 trunk-somite) are modified to form brood-pouches, and are known 

 as " oostegopods " (Fig. 25). The sixth endite is coalesced with 



FIG. 24. 



Trunk-limbs of Cladooera. A, first trunk-limb of Sida crystdUina (Ctenopoda). B, first, 

 }, second, D, third, E, fifth trunk-limbs of Daphnia pulex (Anomopoda). br, branchia ; gn, 

 nathobase. (After Lilljeborg.) 



,he sub-apical lobe, and together with it forms a hemispherical 

 ;up, closed by a movable lid formed by the flabellum. In some 

 .pecies of Conchostraca two or three pairs of limbs near the genital 

 pertures have the proximal division of the flabellum produced 



