148 BULLETIN OF THE 



tales had also observed off Havana. We found a few species of Acan- 

 thometra, Thalassicola, and of Sphserozoum, 



A thorough study of the surface fauna of the Gulf Stream, with refer- 

 ence to its effect in supplying material for the building of the plateaus 

 upon which the Florida reefs have grown, would require an investiga- 

 tion of at least a couple of months at the Tortugas during the most 

 promising part of the season (May and June), as well as a summer's 

 cruise along the track of the Gulf Stream north of the Bahamas, when 

 the principal work should be the collecting of the surface animals found 

 in the course of the Stream. 



A good idea of the richness of the Acalephian Fauna of the Gulf 

 Stream can be formed from the accompanying list of Jelly-fishes observed 

 at the Tortugas and Key West. This list has been prepared by Mr. 

 Fewkes, who during our visit to Florida devoted his time specially to 

 the study of that group. 



I may specially mention among the Ctenophora; a new Ctenophore re- 

 markable as possessing structural characters of the Lobatte, Saccatse, 

 and Eurystomie ; also a magnificent species of Eucharis. A pretty, small 

 Discophore allied to Linerges is found in large numbers all along the 

 Florida reefs and has been observed by the "Blake " off the Windward 

 Islands and in the Caribbean Sea. A new species of Glossocodon is the 

 most interesting of the Hydroids. Our harvest was very rich among 

 the Siphonophores : the greater number of the genera characteristic of 

 the Mediterranean were observed for the first time on this coast, either 

 at Key West or at the Tortugas. 



CTENOPHORE.* 

 Bolina vitrea Ag. 

 Idyia ovata Less. 

 Lesueuria hyboptera A. Agass. 

 Pleurobrachia rhododactyla Agass. 

 Ocyroe sp. nov. 

 Eucharis sp. nov. 



DISCOPHORE. 



Polyclonia frondosa Agass. 

 Aurelia flavidula Per. et Less. 



* See also, for other geof,'raphical lists of Acalephs from Florida and tlie West Indies, 

 A. Agassiz, N. Am. Acalcpliaj, andAllman, IlyJroidea of the Gulf Stream, Mem. Mus. 

 Comp. Zool., and S. F. Clarke, Bull. M. C. Z. 



