366 



ARTICULATA: CRUSTACEA. 



FIG. 498. 



FIG. 499. 



Eye of a Trilobite, magnified. 



Trilobite. 

 br, buckler; p, pygidium; </, glabella; c, cheeks; , eyeg. 



FIG. 500. 

 A 



Minute En tomostracana. Magnified. 



A, Cyclops side view; 1, Cyclops, with cluster of eggs on each side of the tail top 

 view; '2, Cypris ; 3, Daphnia. 



