FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 51 



Description. — Test elongate, narrow, much drawn out at either 

 end, chambers angular, usually the peripheral face of the later cham- 

 bers with distinct costae, the last formed chamber with three, the 

 one preceding with a single median one; wall smooth except for the 

 costae; last formed chamber much extended at the apertural end, 

 with a long narrow neck, aperture circular with a simple tooth. 



Length, 1 mm. or less. 



Distribution. — The species has been recorded from the North 

 Pacific by Brady from Challenger station 260A in 40 fathoms from 

 the coral reefs of Honolulu, Hawaiian Islands, and by Rhumbler 

 from Laysan. I have had material from but two stations, both in the 

 vicinity of the Hawaiian Islands, Nero 2047, in 217 fathoms, and 

 2071 in 271 fathoms. 



These specimens are of the elongate compressed type, which agree 

 with Brady's figures and with the model given by d'Orbigny. Many 

 of the specimens referred to this species by later authors do not at 

 all agree with the typical as represented by the model. 



QU1NQUELOCULINA AMYGDALOIDES (H. B. Brady). 



Miliolina amygdaloides H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 163, pi. 6, figs. 10, a, b. 



Description. — "Test compressed, elongate-oval with tapering ends; 

 one face nearly flat, the other convex and subangular; periphery 

 sharp. Surface smooth, no external constrictions marking the 

 margins of the chambers. Segments numerous, long and narrow; 

 aperture circular, produced. Shell-wall thin and opalescent. 



"Length, one-fiftieth inch (0.5 mm.) or less. 



"This is a minute species but very uniform in its adult characters. 

 The shell is exceedingly neatly made, but owing to the flush sutures 

 the segmentation is always obscure. I know of no previously de- 

 scribed form with which the specimens can properly be associated; 

 the Quinqueloculina pygmaea of Reuss is perhaps the nearest, but 

 the rounded chambers, excavated sutures, and generally larger size 

 sufficiently distinguish that from the present species." 



Distribution. — Brady described this species from comparatively 

 shallow water in the vicinity of some of the Islands of the Pacific the 

 only North Pacific one being from Challenger station 232 in 345 

 fathoms, on the Hyalonema ground south of Japan. 



QUINQUELOCULINA DUTEMPLEI d'Orbigny. 



Plate 18, figs. 1, 3. 



Quinqueloculina dutemplei d'Orbigny, Foram. Foss. Vienne, 1846, p. 294, pi. 

 19, figs. 10-12. 



Description. — Test quinqueloculine, one and at half times as long 

 as wide, chambers sharply angled and carinate peripherally, wall 

 coarsely and longitudinally striate; apertural end somewhat pro- 



