FORAMINIFERA OF THE NOETH PACIFIC OCEAN. 33 



Distribution. — Bagg records this species as S. tenuis from six Al- 

 batross stations in the vicinity of the Hawaiian Islands, varying in 

 depth from 104 to 1,259 fathoms. 



The species occurred at the following stations in the Nero and 

 Albatross material: Nero 1464 in 891 fathoms off Guam; 1054 in 

 1,863 fathoms, 1065 in 1,321 fathoms, 1075 in 1,029 fathoms, and 

 1122 in 1,926 fathoms, all between Guam and; Japan: Albatross 

 D4979 in 943 fathoms off the coast of Japan. 



The species described by Czjzek has a Milioline early development 

 and is not a true Spiroloculina. Most of the stations for this species 

 are in comparatively deep water. 



SPIROLOCULINA ROBUSTA H. B. Brady. 



Spiroloculina robusta II. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 150, pi. 9, figs. 7, 8.— Flint, Ann. Rep. U. S. Nat. Mus., 1897 (1899), p. 

 296, pi. 42, figs. 1, 2. 



Description. — "Test oblong or oval, with angular or pointed ex- 

 tremities, compressed or complanate; broad and thick, slightly con- 

 cave on both faces, rounded at the periphery. Segments few in num- 

 ber, much arched; the inner margin of each overlapping a consider- 

 able portion of the previous segment on the same side, their lateral 

 surfaces crested by angular ridges. 



"Length, one-tenth inch (2.5 mm.)." 



This species was described by Brady from the region of the West 

 Indies, but there are two lots of material in that from the North 

 Pacific which seem to belong to it. These are both from the same 

 general region, Tuscarora 58, in 814 fathoms, latitude 26° 52' N., 

 longitude 142° 21' E.; and Nero 1308 in 1,040 fathoms. 



SPIROLOCULINA MILLETTI Wlesner. 

 Plate 5, fig. 4. 



Spiroloculina nitida II. B. Brady (not a5. nitida d'Orbigny, 1826) Rep. Voy. 



Challenger, Zoology, vol. 9, 1884, p. 149, pi. 9, figs. 9, 10. — Millett Journ. 



Roy. Micr. Soc, 1898, p. 265, pi. 5, figs. 9-12.— Flint, Ann. Rep. U. S. Nat. 



Mus., 1897 (1899), p. 296, pi. 41, fig. 4.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 



1908, p. 119. 

 Spiroloculina milletti Wiesner, Archiv. Prot., vol. 25, 1912, p. 207. 



Description. — Test more or less compressed, the chambers closely 

 adjacent or even a little overlapping, numerous, of about even diam- 

 eter throughout, usually somewhat angular in transverse section, in 

 adult specimens the last-formed chamber with an acute periphery, 

 that of the preceding chamber square or even somewhat concave, 

 apertural end of the chamber somewhat produced, with a distinct 

 tubular neck and occasionally a slightly phialine lip, the aperture 

 rounded, with a single bifid tooth the projections of which are at right 

 angles to the main plate; surface smooth and shining, white. 



