CONTENTS OF NO. 2, SEPTEMBER, 1891. 



I. The Habits and Embryology of the American 



Alligator. Samuel Fessenden Clarke. . 181-214 



II. The Embryology of the American Lobster. Her- 



mon Carey Bumpus, Brown University . . 215-262 



III. The Spcrmatophores of Diemyctylus. Edwin O. 



Jordan, Clark University 263-270 



IV. Compound Eyes of Annelids. E. A. Andrews, 



Baltimore 271-299 



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



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



