278 



BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



It will be seen that the .depths agree well with those already pub- 

 lished from the North Pacific, and it is also interesting that the bot- 

 tom temperatures are comparatively high, as was the case in the sta- 

 tions noted off Japan. With these added stations we now Imow 

 considerable about the distribution of this species, which was de- 

 scribed by Brady from a single Ohallenger station off Japan. Its 

 range can now be well filled in from off southern Japan to Australia, 

 including the Malay Archipelago, and probably occurs widely dis- 

 tributed among the East Indian and Oceanic Islands. Chapman 

 records it from off Funafuti. 



Siphogenerina bifrons — Material examined. 



SIPHOGENERINA BIFRONS (H. B. Brady), var. STRIATULA Cushman, 



Plate 56, fig. 4. 



Siphogenerina bifrons (H. B. Brady), var. striatula Cushman, Proc. U. S. Nat. 

 Mus., vol. 51, 1917, p. 662. 



Description. — Differing from the typical in having the surface with 

 numerous longitudinal striations, rather more elongate, and the 

 central indented portion deeper and more defined. 



At the following stations the variety occurred, sometimes with the 

 typical but usually much more numerous: H4898, Sulu Sea off western 

 Mindanao, 221 fathoms (405 meters); D5110, China Sea, off southern 

 Luzon, 135 fathoms (247 meters), bottom temperature 59° F. (15° C); 

 D5201, Sogod Bay, southern Leyte Island, 554 fathoms (1,012 

 meters), bottom temperature 52.8° F. (11.5° C); D5236, Pacific 

 Ocean, east coast Mindanao, 494 fathoms (903 meters), bottom 

 temperature 41.2° F. (5.1° C); D5268, Verde Island Passage and 

 Batangas Bay, 170 fathoms (311 meters); D5445, east coast of 

 Luzon, San Bernardino Strait to San Miguel Bay, 383 fathoms (699 

 meters), bottom temperature 44.3° F. (6.8° C); D5523, northern 

 Mindanao and vicinity; D5621, between Gillolo and Makyan Islands, 

 298 fathoms (545 meters); D5636, Pitt Passage, 1,262 fathoms (2,309 



