CONTENTS. 



PART I. 



Page 

 No. 1. — List of Dredging Stations occupied by the United States Coast 

 Survey Steamers " Bibb," " Hassler," and " Blake," from 1867 to 1879. 

 B. Peirce and C. P. Patterson, Superintendents 1 



No. 2. — Opliiuridae and Astrophytidse of the " Challenger " Expedition. By 

 T.Lyman. Part IL (9 Plates.) ......... 17 



No. 3. — Reports on the Dredging Operations of the United States Coast Sur- 

 vey Steamer " Blake." V. General Conclusions from a Preliminary Ex- 

 amination of the MoUusca. By W. H. Dall 85 



No. 4. — Reports on the Dredging Operations of the United States Coast Sur- 

 vey Steamer " Blake." VI. Report on the Corals and Antipatharia. By 

 L. F. PouRTALts. (3 Plates.) 95 



No. 5. — The Ethmoid Bone in the Bats. By H. Allen .... 121 



No. 6. — On certain Species of Chelonioidae. By S. Carman .... 123 



No. 7. — Contributions to a Knowledge of the Tubular Jelly -Fishes. By J. 

 W. Fewkes. (3 Plates.) 127 



No. 8. — Letter No. 4 to C. P. Patterson, Superintendent of the United States 

 Coast Survey, on the Dredging Operations of the United States Coast Sur- 

 vey Steamer " Blake." By A. Agassiz 147 



No. 9. — Reports on the Dredging Operations of the United States Coast Sur- 

 vey Steamer " Blake." VII. Description of a Gravitating Trap for obtain- 

 ing Specimens of Animal Life from Intermedial Ocean-Depths. By C. D. 

 Sigsbee. (1 Plate.) 155 



No. 10. — On some Points in the Structure of the Embryonic Zoea. By W. 

 Faxon. (2 double Plates.) 159 



No. 11. —New Species of Selachians in the Museum Collection. By S. 

 Gasman 167 



