CONTENTS. 



Contributions to the Morphology of Cyclostomata- I. On the Forma- 

 tion of the Heart in Petromyzon. By S. Hatta. r]nth I'late 

 XVin.J 225 



The Metamorphosis of Asterias pallida, with Special Reference to 



the Fate of the Body Cavities. By Seitaeo Goto, Professor ill the 

 First High School, Tokyo. (With Plates XIX— XXIV. j 239 



PR1NTï:D at the TÔKYÔ-INSATSU-KABOSHIKI-KWAISHA, TOKYO 



