286 CRUSTACEANS. 



LEAF-FOOTED GROUP, Order PHYLLOPODA. 



Some of the members of this group are relatively large, the body being long 

 and composed of a great number of segments, of which the thoracic, and sometimes 

 the abdominal, are furnished with leaf -like gill-bearing appendages. 



THE GLASSY LEPTODORA, Leptodora hyalina (enlarged 12 times;. 



SCALE-TAILED APUS, Lcpidurus (nat. size). 



