Boone, Coelenterata, Cruises of "Ara" and "Alva" 41 



Family: DIPHYIDAE 

 Subfamily: Abylinae 



Genus: ABYLOPSIS Chun 



Abylopsis tetragona (Otto) 



■f 



Remarks : For discussion of this species refer to Volume IV, 

 Bulletin of the Vanderbilt Marine Museum, p. 36. The present 

 series of specimens, from near the Marquesas Islands, agree 

 closely in all essentials with the "Ara" series, previously reported 

 (1933), from 400 fathoms depth, off St. Raphael, France, in the 

 Mediterranean Sea. 



The seven superior nectophores of the Marquesas Islands 

 series, range from four to six millimeters long, while the free 

 Eudoxids are 3 to 4 millimeters wide. 



All stages of this species have been well described and illus- 

 trated. The diagnostic features distinguishing tetragona from 

 eschscholtzi, the only other species with which it is likely to be 

 confused, have been given in the writer's earlier account. 



Material examined: Seven superior nectophores and five 

 free Eudoxids, taken in a plankton haul, from 150 fathoms to sur- 

 face, north of Nuka Hiva Island, Marquesas Islands, August 11, 

 1931. 



References : Pyramis tetragona, Otto, A, W., Nova Acta Caes. 

 Leop. Carol., 1823, vol. XI, p. 306, taf. 42, figs. 2a-2c, 1883. 



Abylopsis tetragona, Bigelow, H. B., Mem. Mus. Comp. Zool., vol. 

 XXXVIII, 1911, p. 224, pi. 14, figs. 6, 7 and pi. 15, fig. 2. 



Subfamily Diphyopsiinae 



Genus: DIPHYES Cuvier 

 Diphyes bojani (Chun) 



Type: This was taken between Hawaii and the Caroline 

 Islands. The depository is not stated. 



Distribution : This species is known from the tropical Indo- 

 Pacific, in depths varying from the surface to 300 fathoms. In 



