PHYLLOPOD CRUSTACEANS. 



283 



carapace, the mandibular segment being small and not over- 

 lapping the segments behind it. The second antenna* are 



Fig. 243.Lepid//r>is Couesii. 

 side and dorsal view, natural 

 size. 



Fig. 242. Apus cequalis, natural size. 



large and in the male adapted for 

 clasping. In Thamnocephalus (Fig. 

 245, T. Irachyurus Packard, from 

 Kansas) there is a singular shrub- 

 like projection of the front of the 

 head, and the abdomen is spatulate 

 or spoon-shaped at the end. Bran- 

 chinectes Coloradensis Pack. (Fig. 



246) is a Rocky Mountain form. Fig. 844.-a, Larva of 



' J . cnformis. After Zaddacb. ft, 



The brine - shrimp, Artemia, lives Naupliusof Artemia salina oi^a- 



i i j.i ij. rope- 



only in brine-vats or in the salt 



lakes of the West and of Southern Europe. Artemia yra- 

 cilis Verrill (Fig. 247) has thus far only been found in tubs 



