PHYLUM ARTHROPODA 



293 



Fig. 209. Fig. 210. 



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

 wick's Zoology, after Beecher.) 



Fig. 210. — Order Phyllopoda. A, Branchipus stagnalis; B, Arlemia salina. 

 (From Verworn, after Semper.) 



anl.Z 



—7 



Fig. 211. 



Fig. 211. — Order Cladocera. Daphnia, a water-flea. ant.i, antennule ; 

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

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

 after Claus.) 



Fig. 212. — Subclass Ostracoda. Cypris Candida, 1, antennules; .?, anten- 

 nae; 3, mandibles; 4, 1st maxillae; 5, 2d maxillae; 6, 1st pair of legs; 7, 2d pair 

 of legs; S, tail; 9, eye. (From Shipley and MacBrioV after Zenker.) 



