CONTENTS OF VOL. IV. 



No. I.— July, 1890. 



PAGES 



I. Isaac Nakagawa, B.Sc. 



The Origin of the Cerebral Cortex and the 

 Homologies of the Optic Lobe Layers in the 

 Lower Vertebrates i-io 



11. O. P. Hay. 



The Skeletal Anatomy of Amphiinna during its 



Earlier Stages 1 1~34 



III. Charles F. W. McClure, B.A., E.M. 



The Segmentation of the Primitive Vertebrate 

 Brain 35-56 



IV. W. H. Howell, Ph.D. 



The Life History of the Formed Elements of the 

 Blood, especially the Red Blood Corpuscles . S?-^^^ 



V. W. H. Howell, Ph.D. 



Observations upon the Occurrence, Structure, 

 and Function of the Giant Cells of the 

 Marrow 1 17-130 



No. 2. — October, 1890. 



I. J. Playfair McMurrich. 



Contributions on the Morphology of the Actinozoa, 1 3 1- 1 50 



n. Frederick Tuckerman. 



On the Gustatory Organs of Some of the Mam- 

 malia 151-193 



