108 THE BERMUDA ISLANDS. 



the stomatodseum. This is the only Sagartid, with the excep- 

 tion of A. pallida, in which I have observed reproductive organs 

 on the mesenteries of the first cycle, and it is a case of consider- 

 able importance inasmuch as it necessitates an alteration in 

 the definition of the family Sagartidse as given by R. Hertwig.* 

 One of the essentials of the family is that " the principal septa, 

 or septa of the first order, only are perfect aiid at the same 

 time sterile." The last portion of this statement, though true 

 for the majority of Sagartidse, fails in the case of the Aiptasise 

 mentioned. It is not possible to separate Aiptasia from the 

 Sagartidse ; the members of the genus possess acontia, cinclides, 

 the primary mesenteries alone perfect, and a mesodermal mus- 

 cle in some cases, and these must be considered as the chief 

 characteristics of the family. 



As regards the species to which the form under consideration 

 belongs, the probabilities are that it is identical with A. pallida 

 of our Eastern coast, since in its anatomical peculiarities it 

 agrees very closely with that form. The impossibility however 

 of ascertaining the coloration, and what is of much more im- 

 portance, the occurrence and arrangement of the cinclides, 

 has prevented a certain identification, and I have preferred to 

 leave the species in doubt. 



ANTHEAD^. 

 Condylactis passiflora. Buch. and Mich. (Plate 10, fig. 3.) 



Several specimens were obtained of a large form, measuring 

 3.3-2.3 cm. in height and 2.6-3.8 cm. in diameter when pre- 

 served, which resembled in coloration, external characters, and 

 for the most part in internal structure also, the West Indian 

 form Condylactis passiflora. In the alcoholic specimens the col- 

 umn is of a brick -red color wherever the ectoderm has been 

 preserved, and the tentacles are grass-green, this color evi- 

 dently being due to the enormous number of zooxanthellse 

 contained in the endoderm. Professor Heilprin informs me to 

 the best of his recollection the tentacles in the living specimens 



*Loc. cit. 



