COMPARISONS. 



With two columns, one for Grasshopper and the other 

 for Crayfish (and Sow-bug), answer the following questions: 



(1) How many pairs of antennae? 



(2) How does the animal breathe? 



(3) How many segments in the head region? 



(4) How many walking-feet? 



(5) Are there appendages on the abdomen? 



(6) Where are the reproductive openings? 



(7) Are any appendages two-branched? 



(8) Where and what are the excretory organs? 



Read the account of the Hexapoda (pp. 236 to 270) and 



that of the Crustacea (pp. 218 to 231). 



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