CONTENTS. 
No. 1.— The Early Development of Asplanchna Herrickii de Guerne; a con- 
tribution to Developmental Mechanics. By H. S. Jnnnines. (10 Plates.) 
October, 1896 . 
No. 2. — Some Variations in the Genus Eucope. By A. Agassiz and W. M. 
WoopwonTu. (9 Plates.) November, 1896 
No. 3.— Reports on the Results of Dredging in the “Blake” XXXVII. 
Supplementary Notes on the Crustacea. By W. Faxon. (2 Plates.) No- 
vember, 1896 
No. 4. — On the Colors and Color-patterns of Moths and Butterflies. By A. 
G MAYR. (10 Plates). February, 1897 
No. 5. — The Mesenteries and Siphonoglyphs in Metridium marginatum 
Milne Edwards. By G. H. Parker. (1 Plate.) March, 1897 . 
No. 6. — Photomechanieal changes in the Retinal Pigment Cells of Palae- 
monetes and their relation to the central nervous system. By G. H. 
PARKER. (1 Plate.) April, 1807 
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