I. THE GERMINAL SPOT IN ECHINODERM EGGS. 



By H. E. JORDAN. 



II. THE SPERMATOGENESIS OF APLOPUS MAYERI. 



By H. E. JORDAN. 



III. THE RELATION OF THE NUCLEOLUS TO THE CHROMOSOMES IN 



THE PRIMARY OOCYTE OF ASTERIAS FORBESII. 



By H. E. JORDAN. 



IV. THE PELAGIC TUNICATA OF THE GULF STREAM. 



By W. K. BROOKS. 



V. THE ORIGIN OF THE LUNG OF AMPULLARIA. 



By W. K. BROOKS AND B. McGLONE. 



VI. THE ANNUAL BREEDING SWARM OF THE ATLANTIC PALOLO. 



By A. G. MAYER. 



VII. RHYTHMICAL PULSATION IN SCYPHOMEDUSAE. 



By A. G. MAYER. 



VIII. NOTES ON MEDUSAE OF THE WESTERN ATLANTIC. 



By H. F. PERKINS. 



IX. HELMINTH FAUNA OF THE DRY TORTUGAS. 



By EDWIN LINTON. 



X. A VARIETY OF ANISONEMA VITREA. 



By C. H. EDMONDSON. 



