FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 



49 



angles, flattened or slightly concave, smooth and unornamented, 

 basal end of the final chamber projecting nearly its whole width 

 beyond the remainder of the test; apertural end truncate but with- 

 out a neck; aperture with a slightly thickened lip and a simple tooth 

 tending to a broadening or even slightly bifid condition at the free 

 end. 



Length, a little less than 1 mm. 



Distribution. — -The typical form of this species has occurred only 

 at Nero station 1328, in 871 fathoms, between Yokohama and Guam. 



QUINQUELOCULINA DISPARILIS d'Orbigny, var. CURTA, new variety. 

 Plate 14, fig. 2. 



Description. — Variety larger and very much broader than the 

 typical, nearly circular in front view; inner margin of the chambers 

 somewhat convex and overlapping the previous ones. 



Length, up to 2 mm. 





flg. 30.— quinqueloculina disparilis d'orbigny, var. curta, new variety. 

 "Albatross" station 4900, off Japan. 



X18. Specimen from 



Distribution. — Type-specimen (Cat. No. 9168, U.S.N.M.) from^4Z&a- 

 tross station D4900, in 139 fathoms, off Japan. At this station this 

 variety was very common, and all the specimens were of this short 

 stout form. 



QUINQUELOCULINA COSTATA d'Orblgny. 



Plate 15, fig. 1. 



Quinqueloculina costata d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 301, No. 3. — 

 Terquem, Mem. Soc. Geol. France, ser. 3, vol. 1, 1878, p. 63, pi. 6, figs. 3a-5c. 



Description. — Test about twice as long as wide, elliptical or narrowly 

 oval, chambers tumid, peripheral margin broadly rounded, sutures 

 distinct but not deeply depressed, surface ornamented by numerous 

 longitudinal, rather remote lines, apertural and exserted, with a slight 

 neck tapering gradually from the peripheral curve, aperture broadly 

 elliptical, basal end of the chamber broadly rounded, apertural end 

 much darker than the remainder of the test. 



Length, about 1 mm. 



Distribution. — The only material of this species which I have had 

 is from Nero stations 2039 in 24 fathoms and 2041 in 33 fathoms, 

 Waimea Bay, Hawaiian Islands. 



