STEPHANOMIA BIJUGA. 285 



Cupulita tergestina Haeckel, '88b, p. 367. 

 Cupulita fragilis Haeckel, '88b, p. 367. 



Cupulita canariensis Haeckel, '88b, p. 367; Bedot, '96, p. 408. 

 Cupulila (Halistemma) picla Chun, '97a, p. 86, fig. 19. 

 Cupulita bijuga Schneider, '98, p. 123. 

 Antheinodes moseri Agassiz and Mayer, : 02, p. 167, pi. 12. 

 (For the synomymy of <S. cara see p. 349). 



Station 4587 300 fathoms to surface 1 small fragmentary example. 



" 4635 surface 1 excellent specimen, 11 mm. long, 



with 6 (?) nectophores and the 

 primary siphon (Plate 19, fig. 1). 

 4681 300 fathoms to surface 1 very contracted example. 



Acapulco harbor surface 1 excellent specimen about 45 mm. 



long, with 12 nectophores and 

 14 siphons (Plate 19, fig. 5). 



"Albatross" '91 Expedition, Station 53, fragments. 



The descriptions of this species by_ Metschnikoff (70), Claus ('78), and 

 Chun ('88) are so complete that I can add but little to them. There is no 

 doubt that the specimens here recorded are identical with Anthemodes moseri, 

 Agassiz and Maj^er. 



I have been unable to obtain satisfactory specimens of the Atlantic (S'. 

 bijuga. Therefore my identification of the "Albatross" series does not rest 

 on direct comparison. But the agreement is so close, not only in general "habi- 

 tus," but in the shape of nectophores, bracts, and tentilla, and in the arrange- 

 ment of the appendages on the stem, that I have no hesitation in uniting them. 



Apart from S. cara (p. 349), the only known species with which S. bijuga 

 could be confused are S. rubra Vogt, and Anthemodes ordinata, but in the latter 

 the bracts are quadrangular, nearly rectangular (Haeckel, '88b) and very char- 

 acteristic, and the tentilla have numerous terminal filaments, while in S. rubra 

 the tentilla are naked, without involucre. In S. amphilridis, which resembles 

 S. bijuga so far as the tentilla are concerned, the siphosome is much shorter 

 proportionately, stiffer, and less contractile, and the bracts different in form 

 (p. 287). 



The nectophores are useful field marks for the species, their nearly spherical 

 form, and dilated nectosac (Plate 19, fig. 6, 7) distinguishing them at once from 

 those of Agalma elegans (Plate 19, fig. 2, 3). And the same is true of the bracts, 

 which are slender and very soft. As a rule these structures are terminally tri- 

 dentate, but in any one specimen some may be of this shape, others abruptly 



