THE METAMORPHOSES OF CRUSTACEA 81 



carried in a brood-pouch under the back of the 

 carapace, and in this the embryos undergo their 

 development. In the common Daphnia, for instance, 

 numerous eggs or young can generally be seen 

 through the transparent carapace (see Fig. 12, p. 37). 



FIG. 33 LARVAL STAGES OF THE BRINE SHRIMP (Artemia 

 salina). (After Sars.) 



A, Nauplius, just hatched ; B E, later stages, showing progressive 

 increase in number of somites and appendages. The adult 

 form of this species is shown in Fig. 55, p. 164 



Many of the Ostracoda have a direct development, 

 but in some cases the young animal, on hatching, 

 6 



