CONTENTS OF VOL. XV. 



No. I. — October, 1898. 



Pages 



I. William Morton Wheeler. 



A New Peripatiis from Mexico 1—8 



II. Louise B. Wallace. 



The Germ-Rmg in ike Egg of the Toadfisli 



{Batrachjts Tan) ... 9-16 



III. Charles L. Bristol. 



The Metamerism of Nephelis. A Co7ttribtition 

 to the Morphology of the Nervous Systejn, 

 with a Description of Nephelis Lateralis . 17-72 



IV. Edward G. Gardiner. 



The Growth of the Ovum, Forvtatiou of the 

 Polar Bodies, and the Fertilization in Poly- 

 choeriis Caiidatits 73-110 



No. 2. — November, i8g8. 



I. John P. Munson. 



The Ovarian Egg of Limn Ins. A Contributiofi 

 to the Problem of the Centrosome and Yolk- 

 Nucleus 1 1 1-220 



II. Cornelia M. Clapp. 



The Lateral Line System of Batrachns Tan . 223-264 



