p* 



Fig. 23. — Brine-Shrimp (Branckipus), a primitive Crustacean found in 

 salterns in the south of England. The gills are fixed on the bases of 

 the swimming-legs. — [From Lang's ' Comparative Anatomy.') x 20. 



a„ first antenna; ; ft,, the large second antennse ; ua, unpaired eye ; /, liver ; 

 Did, mandible; ,5;/, kidney; k, heart; oh, openings of heart; p, male organ; 



