BIGELOW, MEDUSAE AND SIPHONOPHORAE. 417 



described almost simultaneously, but has since remained problematical, 

 there is every reason to continue to use the name G. quadrivalvis 

 for the bidentate species. And there is the more reason for this, 

 since Gegenbaur's (1853) account of G. quadrivahis was probably 

 taken from the bidentate form, though his description of the base of 

 the superior nectophore, crediting it Tvath only one dorsal tooth, is 

 not clear. And Vogt's (1854) G. auriantaca probably belongs here 

 too, for it is not likely that he would have overlooked the large basal 

 teeth of the superior nectophore, had he been dealing with G. q^iadri- 

 dentata. But we owe to Leuckart (1854, "G. fiUformis^') the first 

 satisfactory account of basal structure of the bidentate species, for 

 he records both the two dorsal teeth, and the two ventral wings of the 

 superior nectophore. (See Bigelow, 1911b). 



Galeolaria quadridentata Quoy and Gaimard. 

 Plate 8, fig. 1, 2. 



Galeolaria quadridentata, Quoy & Gaimard, 1834, p. 45, pi. 5, fig. 32, 33. 



Station 10,186, 185-0 meters, 1 superior and 1 inferior nectophore, 

 respectively 12, and 16 mm. long, in good condition. 



Station 10,197, 100-0 meters, one superior nectophore, 9 mm. long, 

 in good condition. 



Also 2 superior and 2 inferior nectophores, from the Gulf Stream, 

 latitude 38° 33' N., longitude 70° 80' W., Grampus Station 6, 1908; 

 and 2 entire specimens from Naples. 



Superior nectophore. The superior nectophore (Plate 8, fig. 1) so 

 closely resembles that of G. quadrivahis in its general form that it 

 might well be confused with it, were it not for its basal teeth, and for 

 the fact that the somatocyst is somewhat shorter, and stouter, than 

 in the specimens of that species which I have seen (1911b, pi. 5, fig. 2). 

 The lateral subumbral canals arise from the ring-canal, at the point 

 of origin of the ventral canal, as in G. quadrivahis and G. australis, 

 instead of from the ventral canal, at some distance above the ring- 

 canal, as is the case in G. monoica. 



The basal sculpture is the most important specific character of this, 

 as of all other species of Galeolaria. As pointed out above (p. 416), 

 the bell-opening is surrounded by four teeth, and two ventral wings 

 or flaps (Plate 8, fig. 2). Of these teeth, two are lateral, two dorsal. 



