244 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



ailanticum atlanticum. It is more likely that they are, in part, 

 divergent individuals — in some cases immature specimens — of 

 giganteum, and perhaps, to some extent, intermediate forms result- 

 ing from the intercrossing of giganteum with individuals of atlanti- 

 cum ailanticum which had migrated from the Pacific. Atlanticum 

 atlanticum is also reported as occurring in the Indian Ocean. Among 

 the forms reported from the Atlantic Ocean, Seeliger's P. atlanticum 

 tuberculosum approaches most nearly the specimens from the Pacific 

 Ocean, which we here describe as P. atlanticum atlanticum. It seems 

 absurd to apply the name atlanticum to forms known chiefly, and 

 possibly only, from the Pacific Ocean, though others, especially 

 Huxley (1851), have so named them. We therefore must ignore 

 the absurdity of the name. 



Specimens of P. atlanticum atlanticum were obtained during the 

 cruise of the Albatross, as indicated below: 



Albatross Philippine Expedition, 1907-1910: 



D. 5120, Sombrero Island, Verde Island Passage; January 20, 

 1908; 393 fathoms; surface temperature, 43.7° F.; surface density, 

 1.02386; 13 specimens, Cat. No. 6449 U.S.N.M. 



D. 5125, Nogas Island, Sulu Sea, vicinity southern Panay; Feb- 

 ruary 3, 1908; 411 fathoms; surface temperature, 80° F.; surface 

 density, 1.02444; three specimens, Cat. No. 6505, U.S.N.M. 



D. 5128, Nogas Island, Sulu Sea, vicinity southern Panay; Feb- 

 ruary 4, 1908; surface; surface temperature, 80° F.; 13 specimens, 

 Cat. No. 6439, U.S.N.M. 



D. 5155, Bakun Point, Tawi Tawi Group, Sulu Archipelago; Feb- 

 ruary 19, 1908; 12 fathoms; surface temperature, 81° F.; surface 

 density, 1.02437; one specimen, Cat. No. 6506, U.S.N.M. 



D. 5175, Manucan Island, Sulu Sea, southeast of Cagayanes 

 Islands; March 8, 1908; surface; surface temperature, 82° F.; 

 four specimens, Cat. No. 6403, U.S.N.M. 



D. 5183, Lusaran Light, between Panay and Negros; March 30, 

 1908; 96 fathoms; surface temperature, 81° F.; surface density, 

 1.02489; one specimen, Cat. No. 6501, U.S.N.M. 



D. 5195, Capitancillo Island Light, off northern Cebu Island; 

 April 3, 1908; surface; surface temperature, 82° F.; surface den- 

 sity, 1.02518; one specimen, Cat. No. 6502, U.S.N.M. 



D. 5223, Malabrigo Light, between Marinduque and Luzon; 

 April 24, 1908; surface; surface temperature, 84° F.; one specimen, 

 Cat. No. 6509, U.S.N.M. 



D. 5263, Point Origon, off eastern Mindoro; June 4, 1908; 65 

 fathoms; surface temperature, 83° F.; one specimen, Cat. No. 

 6490, U.S.N.M. 



D. 5299, China Sea, vicinity of southern Luzon; August 8, 1908; 

 524 fathoms; surface temperature, 83° F.; surface density, 1.02396; 

 one specimen, Cat. No. 6507, U.S.N.M. 



