PHTLLOPOD CRUSTACEANS. 



«83 



carapace, the mandibular segment being small and not over- 

 lapping the segments behind it. The second antennae are 



Fig. 2iZ.—Lepidurus CoueHi, 

 side and dorsal view, natural 



Fig, 242.— Apas WQualis, natural size. 



large and in the male adapted for 

 clasping. In Thamnocephalus (Fig. 

 245, T. hrachyurus 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 Kocky Mountain form. f}s- ^i.-a, r.arv . ,t Apia can- 



„, , . , .•' . , . 1 . enformU. — After Zaddach. *, 



Ihe brine - shrimp, Artemia, Ivres NmpWaaot ArtemiasaUnaofEu- 

 Ollly in brine-vats or in the salt 



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

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



