MUSEUM OF COMPARATIVE ZOOLOGY. 213 



Bolina alata, Ag. 



This beautiful specimen of Cteuophores was found once, but there is reason 

 to believe that it is common in the Bay of Fundy. 



In the few specimens which were seen there were no parasitic Actinians in 

 the body, as is found in the related Mnemiopsis from Newport. Of course, 

 negative evidence of this kind may not mean much, for early in the season at 

 Newport none of the specimens of Mnemiopsis have specimens of Actinians * 

 in their chymiferous tubes or stomachs. 



Beroe roseola (Ac). 

 Several specimens were found at Grand Manan. 



SIPHONOPHORA. 

 Nanomia cara, A. Ao. 



Plates I,, II., III. 



The only Physophore which was captured at Grand Manan is the interesting 

 medusa called by A. Agassiz f Nanomia cara. This jelly-fish, described many 

 years ago, has been repeatedly mentioned in text-books and general works on 

 zoology, but since its discovery nothing has been added from direct observa- 

 tion to our knowledge of its anatomy and somewhat exceptional embryology % 

 as made known by A. Agassiz. It was therefore with much enthusiasm that 

 I first saw from the wharf back of the Dominion House at North Head, Grand 

 Manan, many specimens of this beautiful animal swimming in the water. As 

 is well known, many interesting and doubtful details of anatomy remain yet to 

 be made out in regard to this animal, and it was with keen pleasure that the 

 medusa was captured in abundance and placed in aquaria for study. 



* It is, however, an interesting fact that I went directly from Eastport and 

 Grand Manan to Newport, and on my arrival tliere, not more than five days after 

 leaving the nortliern localities, plenty of Actinians in Mnemiopsis were found. 

 The yearly record of the time of the appearance of this parasite at Newport 

 shows it much earlier in otlier years than at the time I was at Eastport. 



t Proc. Bost. Soc. Nat. Hist., IX. 181 ; Nortli American Acalephae, Illiist. Cat. 

 Mas. Comp. Zool., II. 200-213; Seaside Studies in Natural History, pp. 76-8o. 



X Although nothing has been added to a knowledge of its anatomy and devel- 

 opment, the possibility that a closely allied Physopliore occurs in the Arctic is 

 commented upon by Moss and by the author. So little is known of the generic 

 characters of the Physophore supposed to be Nanomia from Robeson's Channel 

 and Lady Franklin Bay, tliat we cannot definitely say they are the same. There 

 seems no good reason to doubt their identity. 



