Pace 
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CONTENTS. 
No. 1. — Letter No. 1 to C. P. Patterson, Superintendent United States Coast 
Survey, on the Dredging Operations of the United States Coast Survey 
Steamer “ Blake.” By A. Agassiz 
No. 2. — On the Presence of Demodex Folliculorum in the Skin of the Ox. 
By W. Faxon. (1 Plate) ۰ ۰ i 
No, 8.— The Richmond Boulder Trains. By E. R. Benton, 
(2 Maps) 
No. 4. — Description of a New Species of Corbicula, with Notes on other 
Species of the Corbiculade Family. By Tumern Primm, (1 Plate) 
No. 5. — Note. in the Anatomy of Corbiculade: (Mollusea) and a Translation 
from the Danish of an Article on the Anatomy of Cyclas by JACOBSEN, By 
فده‎ Prime. (1 Plate) ۰ 
Anatomy of Cyclas . " " ۰ 
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. Acassiz. With Preliminary Report 
on the Mollusca of the Expedition. By W. H. Datu. (2 Plates) 
Report on the Mollusca . ۰ dd 
No; T. — Ophiuride and Astrophytide of the Challenger Expedition. By 
T. Lyman, Part I. (10 Plates) 
No. 8. — Reports on the Dredging Operations of the United States Coast Sur- 
vey Steamer “ Blake." I. Deseription of Sounding-Machine, Water-Bottle, 
and Detacher. By Linut.-Commanpnr C. D. Siaspen, U. S.N. (5 Plates) 
No. 9. — Reports on the Dredging Operations of the United States Coast Sur- 
vey Steamer “ Blake.” II Echini, by A. Acassiz. Corals and Crinoids, by 
L. F. pe Pourraris. Ophiurans, by T. Lyman. Preceded by a Biblio- 
graphical Notice of the Publications relating to Deep-Sea Investigations 
carried on by the United States Coast Survey 
Bibliographical Notice 
Echini. (5 Plates) ۰ 
Corals. (1 Plate) A . " . ۰ " ۰ 
Young Holopus. (1 Plate) . » " ۰ ۰ 
Crinoids f ۰ ] . " ‘ ۰ ۰ 
Ophiurans and Astrophytons. (3 Plates) . 
No. 10.— Reports on the Dredging Operations of the United States Coast 
Survey Steamer “ Blake.” III, Report on ۷ By S. F. CLARKE. 
(5 Plates) ۰ ۰ ; ۰ ۰ ‘ ۰ ۰ , 
