2 8 6 CR USTA CEANS. 



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. 



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the glassy leptodora, Leptodora hyaliiia (enlarged 12 times;. 



scale-tailed apus, Lepidurus (nat. size). 



