122 



AX I. MA I. 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 

 f notebook.) 







Kig. 229. — Drawing the Seine. 



