CONTENTS OF No. i, OCTOBER, 1898. 



I. A New Peripatns from Mexico ..... i-8 



William Morton Wheeler. 



II. The Germ-Ring in the Egg of the Toad-Fish 



{Batrachus Tan) 9-16 



Louise B. Wallace. 



III. The Metamerism of Nephelis. A Contribution 



to the Morphology of the Nenwns System, 



with a Description of Nephelis Lateralis . 17-72 



Charles L. Bristol. 



IV. The Groivth of the Ovttm, Formation of the 



Polar Bodies, and the Fertilization in 



Polychoenis Caiidatns 73-110 



Edward G. Gardiner. 



GINN & COMPANY, BOSTON, U.S. A 



