FOBAMINIFERA OF NORTH PACIFIC OCEAN. 33 



LAGENA AURICULATA H. B. Brady, var. LINEARITUBA, new variety. 



Plate 17, fig. 5. 



Lagena auriculata H. B. Brady (part), Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 487, pi. 60, fig. 31. 



Description. — Test elongate, ovate, broadest below the middle, 

 apical end broadly rounded, apertural end gradually tapering to an 

 obtuse point; surface smooth, lateral tubulations much elongated and 

 very shallow ; aperture radiate. 



Length 0.5 mm. 



Distribution. — Type-specimen, Cat. No. 8536, U.S.N.M., from Nero 

 station 1294 between Guam and Yokohama in 1,417 fathoms 



This is the form referred by Brady to this species with a question. 



LAGENA ALVEOLATA H. B. Brady. 



Plate 18, fig. 1. 



Lagena alveolata H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 487, 

 pi. 60, figs. 30, 32. — Sidebottom, Mem. and Proc. Manchester Lit. and Philos. 

 Soc, vol. 50, No. 5, 1906, p. 15, pi. 2, fig. 17; Journ. Quekett Micr. Club, vol. 

 11, 1912, p. 424, pi. 21, figs. 1, 2. 



Description. — "Test pyriform compressed, lateral edges obtuse 

 or rounded; base broad and round in outline, rarely mucronate; 

 furnished with a median and two lateral carinae, which unite so as 

 to form two loops on each side of the test, usually separated by a 

 central depression." 



Length 0.3 to 0.5 mm. 



Distribution. — Brady records this species from a single station 

 in the North Pacific in 2,300 fathoms. I have had the typical form 

 from three Nero stations between Guam and Yokohama; 1065 in 

 1,321 fathoms, 1155 in 1,632 fathoms and 1440 in 1,737 fathoms. 



The species seems to occur nearly always in deep water as noted 

 by Brady. This typical form of the species is small, the test sub- 

 transparent, the loops entirely at the sides, very different from the 

 following. 



LAGENA ALVEOLATA H. B. Brady, var. PLEBEIA, new variety. 

 Plate 18, fig. 2. 



Description. — Test larger than the typical, coarser, opaque, walls 

 thick, the three keels separated from one another, forming two 

 gaping depressions at either side of the median keel, margins rough- 

 ened, apertural end much like the typical. 



Length 0.5 to 0.9 mm. 



Distribution. — This form is by far the most common of the species 

 in the North Pacific. It occurred at Nero station 170 in 1,990 

 fathoms, southeast of the Midway Islands, and at 10 stations between 

 Guam and Yokohama, in depths varying from 1,040 to 2,250 fathoms. 



