No. 9. — Reports on the Results of Dredging, under the Supervision 
of ALEXANDER AGASSIZ, in the Gulf of Mexico, by the United 
States Coast Survey Steamer “ Blake,” LIEUTENANT-COMMANDER 
C. D. SIGSBEE, U. S. N., Commanding. 
Published by permission of Carlile P. Patterson, Supt. U. 8. Coast Survey. 
II. 
Report on the Echini, by ALEXANDER AGASSIZ, Crinoids and Corals, by 
L. F. nx PounrALEs, and Ophiurans, by THEODORE Lyman, Preceded 
by a Bibliographical Notice of the Publications relating to the Deep-Sea 
Investigations carried on by the United States Coast Survey. 
INTRODUCTION. 
Baron giving the results of the renewed investigations into the char- 
acter of the bottom of the sea in the vicinity of the coast of the United 
States, and of the Fauna living on it, instituted by the United States 
Coast Survey, it is instructive and interesting to give at this time a list, 
prepared by Mr. Pourtalés, of the publications relating to those researches 
made under the auspices of that great national work during the super- 
intendence of A. D. Bache, B. Peirce, and C. P. Patterson. In the be- 
ginning the investigations were mainly restricted to microscopical exam- 
inations of the specimens of bottom brought up by the sounding lead, 
and the aim was originally to find therein aids to navigation. Later 
on the dredge was brought into requisition, and the greatly increased 
amount of material was worked up and published at the expense or 
under the direction of the Museum of Comparative Zoology. 
1850, On the Distribution of Foraminifera on the Coast of New Jersey, as 
shown by the off-shore Soundings of the Coast Survey. By L. F. Pourtalés. 
Proc. Amer. Assoc. for Adv. of Sc., Charleston Meeting, 1850. 
1850, On the Order of Succession of Parts in Foraminifera, By L. F. Pour- 
talds. Proc. Amer. Assoc. for Adv. of Se, Charleston Meeting, 1850. Also 
Amer, Journ, of Sc. and Arts, 2d series, Vol. II. 1851. 
1851. Extracts from the Report of Professor L. Agassiz to the Superintend- 
ent of the Coast Survey on the Examination of the Florida Reefs, Keys, and 
