CONTENTS 



Page 



Materials 353 



Methods 354 



Results 355 



Various skeletal structures 355 



Scales 355 



Results of ring counts 355 



Vertebrae 356 



Description 356 



Change in the shape of vertebrae with growth of fish 356 



Criterion for an annulus 356 



Results of ring counts __ 357 



Samples from small fish _ 357 



Determination of time of ring formation . 357 



Discussion 358 



Summary and conclusions . . 360 



Literature cited - 363 



