THE BRANCHIOPODA 



41 



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

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

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



Fio. 24. 



Trunk-limbs of Cladooera. A, fir.st trunk-limb of Sida cr]\Mamna (Ctonopoda). B, first, 

 C, second, D, third, E, fifth trunk-limbs of Dajthnla pulex (Anoniopoda). hr, l.ranchia ; gn, 

 gnathobase. (After Lilljeborg.) 



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

 cup, closed by a movable lid formed by the flaljellum. In some 

 species of Conchostraca two or three pairs of limbs near the genital 

 apertures have the proximal division of the Habellum produced 



