CONTENTS. 



Page 

 No. 1. — Letter No. 1 to C. P. Patterson, Superintendent United States Coast 

 Survey, on the Dredging Operations of tlie United States Coast Survey 

 Steamer " Blake." By A. Agassiz 1 



No. 2. — On the Presence of Demodex FoUiculorum in the Skin of the Ox. 



By W. Faxon. (1 Plate) 11 



No. 3. — The Richmond Boulder Trains. By E. R. BiiNTOx. (2 Maps) . 17 

 No. 4. — Description of a New Species of Corbicula, with Notes on other 



Species of the Corbiculadae Family. By Temple Prime. (1 Plate) . 43 



No. 5. — Notes on the Anatomy of Corbiculadae (Mollusca) and a Translation 

 from the Danish of an Article on the Anatomy of Cyclas by Jacobsen. By 



Temple Prime. (1 Plate) 47 



Anatomy of Cyclas 49 



No. 6. — Letter No. 2 to C. P. Patterson, Superintendent of the United States 

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

 Survey Steamer " Blake." By A. Agassiz. With Preliminary Report 

 on the Mollusca pf the Expedition. By W. H. Dall. (2 Plates) . . 56 

 Report on the Mollusca tjO 



No. 7. — Ophiuridae and Astrophytidae of the Challenger Expedition. By 

 T. Lyman. Part I. (10 Plates) 65 



No. 8. — Reports on the Dredging Operations of the United States Coast Sur- 

 vey Steamer " Blake." 1. Description of Sounding-Macliine, \Vater-BottIe, 

 and Detacher. By Lieut.-Commander C. D. Sigsbee, U. S.N. (5 Plates) 169 



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

 vey Steamer " Blake." IL Echini, by a. Agassiz. Corals and Crinnids, by 

 L. F. de Pouktal:es. Ophiurans, by T. Lyman. Preceded by a P.iblio- 

 graphical Notice of the Publications relating to Deep-Sea Investigations 



carried on by the United States Coast Survey 181 



Bibliographical Notice ]gi 



Echini. (5 Plates) jgg 



Corals. (1 Plate) lOy 



Young Holopus. (1 Plate) 213 



Crinoids 214 



Ophiurans and Astrophytons. (3 Plates) 217 



No. 10. — Reports on the Dredging Operations of the United States Coast 

 Survey Steamer " Blake." III. Report on Hydroida. By S. F. Clarke. 

 (5 Plates) 239 



