BIGELOW: MEDUSAE AND SIPHONOPHORAE. 403 



CuBOiDEs viTREus Quoy and Gaimard. 



Cuboides vitreus Quoy & Gaimard, 1827, p. 19, pi. 2e, fig. 1-3. 

 (For synonymy, see Bigelow, 1911b, p. 190). 



Station 10,198, 75-0 meters, 1 specimen. 



Prayidae Kolliker. 

 Amphicaryon acaule Chun. 



Amphicaryon acaule Chun, 1888, p. 1162; Bigelow, 1911b, p. 195, pi. 4, 

 fig. 1-8; Moser, 1912a, p. 529; 1913a, p. 146. 



This species was taken at Stations 10,162, 10,166, 10,169, 10,186, 

 10,187, 10,195, 10,197, 10,203, 10,210; a total of about 30 specimens, 

 in hauls varying in depth from 600-0 meters to 50-0 meters. It was 

 not taken on the surface, most of the captures being from 100-0 

 meters. 



Unfortunately the specimen? are all so fragmentary that they add 

 little, beyond confirmation, to my earlier (1911b) account of this 

 peculiar genus. I may note however, that in none of them does the 

 larger nectophore entirely enclose the smaller scale-like one as Chun 

 (1888) describes it; nor was this the case in any of the Albatross 

 specimens. And the lateral subumbral canals of the larger necto- 

 phore usually bear a series of short lateral diverticula near their 

 upper end, which were not present in the Albatross specimens from 

 the eastern Pacific (1911b). 



The extreme reduction of the stem to a disc or plate, mentioned 

 by Chun (1888), is very evident in several of the present specimens, 

 the cormidia being borne on short stalks on either side of the lines of 

 attachment of the two nectophores. In the larger specimens there 

 are 6-9 cormidia, 3-5 on either side. 



HiPPOPODiiDAE Kolliker. 



Most recent students (Haeckel 1888, Chun 1897b, Bigelow, 1911b) 

 have recognized two genera in this family, Hippopodius with rounded, 

 Vogtia with angular nectophores. Schneider (1898) and Moser 

 (1911-1915) have united them, thinking this character too trivial to 

 be given generic importance. But the study of a new hippopodid 

 in the Bache collection has convinced me that neither of these schemes 



