14 MINUTE MARVELS OF NATURE 



Figs. 5 and 7, and many are extremely delicate ; 

 but all alike possess their characteristic wrink- 



i'"ig. 6. Diatoms dredgerl from the Atlantic at a 

 deptii of about 2:} miles 



ling's, dottings, and markings, when highly magni- 

 fied. 



It is extremely interesting to watch the peculiar 

 gliding movements of some of these boat-shaped 



