IV CONTENTS. 



No. 2. — February, 1895. 



Pages 



I. Albert C. Eycleshymer. 



The Early Development of Ambly stoma, 

 with Observations on Some Other 

 Vertebrates 343-418 



II. T. H. Morgan. 



The Formation of the Fish Embryo . . 419-472 



III. H. F. Moore. 



On the Structure of Bimastos Palustris, 



a New Oligochaete 473-496 



IV. J. Percy Moore. 



The Anatomy of Bdellodrilus Illumijiatus, 

 an American Discodrilid 497-540 



GINN & COMPANY, BOSTON, U.S.A. 



