120 BULLETIN OF THE 



to exist in lesser depths ; nor have any of the common species of the 

 reefs been brought up from a considerable depth. The Gorgonians 

 however are represented in 270 fathoms by at least two species known 

 to belong to the West Indian Fauna in moderate depths. 



Farther researches in all the zones of depth are much needed ; and 

 we hope to have an early opportunity of continuing our researches in 

 the Gulf of Florida, so as to throw more light upon this interesting 

 subject. 



Cambridge, December 26, 1867. 



