PHTLLOPOD CRUSTACEANS. 



283 



carapace, the mandibular segment being small and not over- 

 lapping the segments behind it. The second antennae are 



Fig. ^i4Z.—Lepidwu$ Cotiesii, 

 eide and dorsal view, natural 

 size. 



Pig. mZ.—Apus 



is, natural size. 



large and in the male adapted for 

 clasping. In Thamnocephalus (Fig. 

 245, T. hracliyurus 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- 

 cTiinedes Coloradensis Pack. (Fig. 



246) is a Eocky Mountain form. Fig. S44.-a Larva of Apm can- 

 mi , • T • , , ■ 1 • cH/ormls. — After Zaddaoh. 6, 



ihe brme- shrimp, Ariemia, n\es NaupUus of ^rfema saKna of Eu- 

 only in brine-vats or in the salt ""^^' 

 lakes of the "West and of Southern Europe, Artemia gro' 

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



