No. 9. — Reports on the Results of Dredging, under the Supervision 

 of Alexander Agassiz, in the Gulf of Mexico, by tlie United 

 States Coast Survey Steamer "Blake" LlEUTENANT-COMMANDER 

 C. D. SiGSBEE, U. S. K, Commanding. 



Published by permission of Carlile P. Patterson, Supt. U. S. Coast Survey. 



II. 

 Report on the Echini, by Alexander Agassiz, Crinoids and Corals, by 

 L. F. DE PouRTALEs, and Ophiurans, by Theodore Lymax. Preceded 

 by a Bibliographical Notice of the Publications relating to the Deep-Sea 

 Investigations carried on by the United States Coast Survey. 



INTRODUCTION. 



Before 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. Pourtales, 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 I'estricted to microscopical exam- 

 inations of the specimens of bottom brought up by the sounding lead, 

 and thv. aim was originally to find therein aids to navigation. Later 

 on the uredge 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 ZoiJlog}'. 



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. Pourtales. 

 Proc. Amer. Assoc, for Adv. of Sc, Charleston Meeting, 1850. 



1850. On the Order of Succession of Parts in Foraminifera. By L. F. Pour- 

 tales. Proc. Amer. A.ssoc. for Adv. of Sc, 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 



