122 



AXIMAL BIOLOGY 



How does the tail of a shark or a gar differ from the 

 tail of common fishes? (Fig. 228.) Do you know of fish 

 destitute of scales ? Do you know of fish with whiplike 

 feelers on the head ? (Figs.) Why are most fishes white 

 on the under side ? 



Comparative Review. (Copy table on one page or two facing pages 

 of notebook.) 



FIG. 229. DRAWING THE SEINE. 



