526 MB. a. J. ROMANES ON SOME NEW SPECIES, VARIETIES, 



as in tlie case of T. indicans, being confined to a narrow 

 and continuous line round the margin of the nectocalyx. In 

 colour, however, the light emitted by this species is much more 

 blue than that which is emitted by T. indicans. This Medusid is 

 somewhat rare, and is certainly the most beautiful with which I 

 am acquainted. For it I propose the name Tiarops polydiademata. 



4. A species of the genus Sarsia, in general form resembling S. 

 tuhulosa; but having its "umbilicus" and eye-specks of a bright 

 red colour, and its manubrium and tentacles of a rose-pink. 

 It is perhaps doubtful whether these distinctions are sufiS.cient to 

 justify me in assigning to this form a specific character. At 

 any rate, in the absence of information concerning the life- 

 history of this Medusid, it is better, I think, to leave it an open 

 question whether we have here a distinct species, or a mere 

 variety of S. tuhulosa. Should the possession of red eye-specks, 

 however, eventually prove to be a specific character, I would 

 suggest Sarsia erythrops as an appropriate name for the species. 

 The form in question is probably the same as that to which 

 Forbes alludes * as having been met with by Mr. Patterson at 

 Larue. 



5. A species of Bougainvillea {Kippocrene), closely resembling 

 B. superciliaris, except in being from three to four times the size 

 which L. Agassiz describes as natural to that species. As mere 

 size, however, is an extremely unsafe criterion of specific difference 

 in the case of the Medusae, I think it is better provisionally to 

 regard this form as a variety of B. superciliaris. Bougainvillea 

 gigantea would seem a suitable name for this Medusid, if it should 

 ever certainly prove to be a distinct species. 



6. Another species of Bougainvillea, also resembling B. super- 

 ciliaris in general, but diifering from that species in the follow- 

 ing particulars : — {a) in being about twice the size ; (5) in 

 having many more tentacles in each of the four tentacular groups 

 — i. e. between 30 and 40 tentacles in each group ; and (c) in 

 having its manubrium much more richly branched. I am in- 

 clined to regard this as a new species, and propose for it the 

 name Bougainvillea fruticosa. 



To this brief description of new and probably new species I 

 may add a few words upon certain varieties of known species. 



(«) StomohracMum octocostatum, as described and figured by 

 Forbes, difi'ers somewhat from the varieties I met with in the 

 "'- Monograph of British Naked-eyed Medusa?, p. 56. 



