CONTENTS OF No. i, JUNE, 1891. 



Pages 



I. On the Osteology of Poebrotlierium : a Con- 

 tribution to the Phytogeny of the Tylopoda. 

 W. B. Scott, College of New Jersey, Prince- 

 ton ■ . . 1-78 



II. A Contribution to the Morphology of the Verte- 

 brate Head, based on a Study of Acanthias 

 vulgaris. Julia B. Platt 79-112 



III. Reproductive Organs of Diopaira. E. A. 



Andrews 1 13-124 



IV. Contributions on the Morphology of the Actin- 



ozoa. III. The Phytogeny of the Actinozoa. 



J. Playfair McMurrich 125-164 



V. Development of the Lesser Peritoneal Cavity in 



Birds and Mammals. F. Mall . . . . 165-179 



Typography by J. S. Cushing & Co., Boston, U.S.A. 

 Presswork by Ginn & Co., Boston, U.S.A. 



