PHYLUM ARTHROPODA 



2 93 



FIG. 209. FIG. 210. 



FIG. 209. Dorsal surface of a Trilobite, Triarthrus becki. (From Sedg- 

 wick's Zoology, after Beecher.) 



FIG. 210. Suborder PHYLLOPODA. A, Branchipus stagnalis, fresh-water 

 form; B, Artemia salina, salt-water form of the same crustacean. (From Ver- 

 worn, after Semper.) 



.ant.Z 



FIG. 2n. V X FIG. 212. 



FIG. 211. Suborder CLADOCERA. Daphnia, a water-flea, ant.i, anten- 

 nule; ant.2, antenna; br, brain; br.p, brood-pouch; E, eye; d.gl, digestive 

 gland; /, swimming feet; ht, heart; sh.gl, shell-gland. (From Parker and 

 Haswell, after Claus.) 



FIG. 212. Order OSTRACODA. Cypris Candida, i, anteunules; 2, anten- 

 nae; 3, mandibles; 4, ist maxillae; 5, 2d maxillae; 6, ist paii of legs; 7, 2d 

 pair of legs; 8, tail; Q, eye. (From Shipley and MacBride, after Zenker.) 



