284 STEPHANOMIA BLJUGA. 



are of different shapes (c/. Plate 20, fig. 3, with Fewkes, '88a, pi. 2, fig. 8). 

 The geographic occurrence of the two points in the same direction, for cara 

 is restricted to and typical of Arctic waters, rarely straggling as far south as 

 Massachusetts Bay, whereas bijuga is at home in the Mediterranean, at the 

 Canaries (Chun, '88), and among the West Indies (Fewkes, '82a). 



But a definite answer to the question will depend upon an actual com- 

 parison of specimens. Certainly it can never result from Fewkes's rather 

 generalized account or figures. I made a visit to Grand Manan during the 

 summer of 1910, with this in view, but although Fewkes found cara very 

 common there, I did not see a single specimen. Until such a comparison 

 is made, it is better to retain cara as a distinct species, lest by combining the 

 two the necessity for a critical examination of them be obscured. 



The description of Sars's Norwegian Stephanomia is so incomplete that it 

 is impossible to determine whether it is identical with the southern bijuga 

 until it is reexamined. In the meantime the whole question of the geographic 

 distribution of the cara-bijuga group must be left unsettled. 



A third species of Stephanomia is the S. {Halistemma) rubra of ^"ogt, the 

 tentilla of which have no involucre; a fourth is Stephanomia amphitrides 

 Petron and Lesueur, the type of the genus. 



Recently Lens and Van Riemsdijk (:08), have described as new S. {Hali- 

 stemma) cupulifera, distinguished from S. rubra by the terminal filament of 

 each tentillum bearing "at its terminal end a small acorn-shaped appendage" 

 (:08, p. 85). Judging from their figure (:08, pi. 16, fig. 117) the tentilla seem 

 sufficiently distinct to warrant recognizing at least provisionally their species. 

 Stephanomia bijuga and S. amphitridis are represented in the "Albatross" col- 

 lection, and I have been able to study excellent examples of »S. rubra from 

 Naples. 



Stephanomia bijuga (Delle Chiaje). 

 Plate 19, figs. 5-11, Plate 20, figs. 1-3. 



Physsophora bijuga Delle Chlue, '42, pi. 181, fig. 3-6. 



? Agalmopsis elegans Sars, '46, p. 32, tab. 5, 6; Claus, '78, p. 38 (partim). 



Anthemodes canariensis Haeckel, '69b, p. 36, taf. 1; '88a, p. 40; Chun, '88, p. 1170. 



Halistemma pidum Metschnikoff, '70, p. 305, tab. 2; Chun, '88, p. 1167. 



Stephanomia {Anthemodes) canariensis Metschnikoff, '74, p. 36. 



Stephanomia jrictum Metschnikoff, '74, p. 36. 



Halistemma lergeslinum Claus, '78, p. 1, taf. 1, 2. 



Agalmopsis fragile Fewkes, '82a, p. 267, pi. 5, fig. 2, pi. 6, fig. 16, 17, 23-25. 



Anthemodes picta Haeckel, '88a, p. 40. 



Halistemma fragile Haeckel, '88a, p. 40. 



Cupulita picta Haeckel, '88b, p. 367; Bedot, '90, p. 407. 



