lY. — Notes on some Actinians from the Bahama Islands, col- 

 lected by the late Dr. J. I. Northrop. 



BY J. PLAYFAIR m'mURRICH, PH. D. 

 Read April 11, 1896. 



The Actinians which form the subject of this paper were col- 

 lected by the late Dr. J. I. Northrop, of Columbia College, during 

 a visit to the Bahama Islands some years ago. It had been Dr. 

 Northrop's intention to work over the collection himself. Before 

 his lamented death he had studied several species more or less 

 thoroughly. The drawings and preparations which he had made 

 were entrusted to me, together with the collection, b}^ Mrs. North- 

 rop, and have proved of great assistance in determining the 

 affinities of certain forms. Especially was this true in regard to 

 Heteractis lucida, whose sj^stematic position Dr. Northrop had 

 •correctly determined, and the notes on Diplactisbermude7isis2iud 

 Isaurus Duchassaingi were also very full. 



I have taken pains to verify all the important facts contained 

 in the notes, and it has seemed more convenient for the present 

 purpose to describe in my own words the various forms to be 

 considered, rather than to attempt a rearrangement of Dr. North- 

 rop's notes with such additions as might seem necessary. 



The following is a list of the species in the collection. 



HEXACTINI^. 

 Suborder Actininae. 



Family SAGARTID^. 



1. Aiptasia tagetes (D & M. ) Andr. 



2. Heteractis ludda D. & M. 



Family ANTHEAD^. 



3. Condylactis passiflora D. & M. 



Family DENDROMELID^. 



4. Lehrunea neglecta D. & M. 



Annals N. Y. Acad. Sci., IX, July, 1896.— 13 



