90 



ZOOLOGY. 



Phyllopods hatch in the form of a minute Nanplius (Fig. 

 112), additional segments and limbs being acquired during 



Fig. 109. — Apus cequalis. Natural size. Fig. 110.— Lepidurus Couesii. sido 



and dorsal view. Natural size. 



successive moults or changes of skin. The brine shrimp 

 (Fig. 113) resembles Branch ipus, but is much smaller; it 



Fig. 111. — Brancldpus vernalis. a', 1st antenna; a", 2d antenna. Slightly 



enlarged. 



inhabits Great Salt Lake in Utah and other salt lakes in 

 the West and in the Old World, as well as tubs on railroad 



