riDemolrs of tbe /iDuseum of Comparative Zoology 



AT HARVARD COLLEGE. 

 Vol. XL. No. 9. 



STUDIES FROM THE NEWPORT MARINE LABORATORY 



Communicated by Alex.\nder Agassiz. 



XVI. 

 THE DEVELOPMENT OF OSSEOUS FISHES. 



II. 



THE PRE-EMBRYONIC STAGES OF DEVELOPMENT. 



PART SECOND. — THE HLSTORY OF THE EGG: CLEAVAGE, FORMATION OF THE 

 PERIBLAST, AND DEVELOPMENT OF THE GERM RING. 



BY 



ALEXANDER AGASSIZ and C. O. WHITMAN. 



WITH ELEVEN PLATES. 



CAMBRIDGE, U.S.A.: 



prlnte& foe tbe /Duseum. 



April, 1915. 



