176 



BULLETm 104, UNITED STATES NATIONAL MUSEUM. 



Abrohlos Bank, 260 fathoms (476 meters) (Parker and Jones), in the Red 

 Sea, 580 fathoms (1,061 meters) ; in the Southern Ocean, off Prince Edward 

 Island, 50 to 150 fathoms (91 to 274 meters) ; and in the South Pacific, off 

 Tahiti, 420 fathoms and 620 fathoms (768 meters and 1,134 meters) : ofC Ki 

 Islands, 580 fathoms (1,061 meters) ; and off Kandavu, Fiji, 255 fathoms (460 

 meters). 



He later in 1887 records it from shallow water off the coast of the 

 British Isles. It is also recorded in the Atlantic from the Norwe- 

 gian Sea (Goes) and off the west of Scotland (Heron-Allen and 

 Earland). Sidebottom records it from the east coast of Australia 

 in 465 fathoms (850 meters), Bagg from off the Hawaiian Islands, 

 and I have recorded several stations in the Western Pacific. The 

 Albatross collections show it to be present at five stations, one off 

 the coast of Georgia, one between Cuba and, Yucatan, and three in 

 the Caribbean. These, as the table shows, are in considerable 

 depths. 



This shows a very wide distribution for this species. A study 

 of the Atlantic specimens and a comparison of them with the other 

 material available shows the following results. Our Albatross 

 specimens from the Atlantic seem to be more compressed, the 

 uniserial portion smaller in comparison and of fewer chambers, and 

 the reentrants of the basal portion of the chambers reduced or 

 wanting. The original figures of Parker and Jones show this char- 

 acter and not that of the Pacific specimens. One of the original 

 stations of Parker and Jones was the Abrohlos Bank and it is to be 

 suspected that the figured tj'pe specimen came from this locality. 

 This is more strongly indicated by a comparison of this type figure 

 with that given in 1888 from the Abrohlos Bank, The two strongly 

 suggest that both figures may have been drawn from the same 

 specimen. The figure given by Goes in 1894 from the Atlantic is 

 also of this form. Brady's figures and mine from the Pacific have 

 the cylindrical form, the greater proportion of the uniserial devel- 

 opment, and the deeply incised ventral border to the chambers. 

 This suggests, therefore, that there is a varietal form in the Pacific. 



Siphogenerina dimorpha — material examined. 



