FOEAMINIFERA OF NORTH PACIFIC OCEAN. 23 



LAGENA SULCATA (Walker and Jacob), var. ALTICOSTATA, new variety. 

 Plate 9, fig. 5. 



Description. — Test subglobular, ornamentation consisting of a few 

 prominent primary costse high, thin, and plate-like, running from 

 the aperture to the apical end of the test; between these, secondary 

 costae running only to the base of the neck, the alternating ones of 

 these being shorter; aperture small, rounded. 



Length 0.4 mm. 



Distribution. — Type-specimen, Cat. No. 8530, U.S.N.M., from Nero 

 station 991 in 1,143 fathoms off Guam. It also occurred at Nero 

 station 1466 in 234 fathoms in the same vicinity. 



LAGENA SULCATA (Walker and Jacob), var. APICULATA, new variety. 

 Plate 9, figs. 3, 4. 



Lagena sulcata, apiculate forms, H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, pi. 58, figs. 4, 17 (?). 



Description. — Test like typical L. sulcata, but the apical end drawn 

 out into a stout spine; aperture rounded. 



Length 0.60-0.85 mm. 



Distribution. — This variety occurred at Nero station 172 in 2,086 

 fathoms near the Midway Islands and at several Nero stations 

 between Yokohama and Guam at depths ranging from 1,299 to 1,737 

 fathoms. It also occurred at two Albatross stations off Japan, 

 D4807 in 44 fathoms and D5054 in 282 fathoms. 



Type-specimen. — Cat. No. 8531, U.S.N.M., from Nero station 1440 

 in 1,737 fathoms. 



LAGENA ACUTICOSTA Reuss. 



Plate 8, figs. 9, 10; plate 23, fig. 2. 



Lagena acuticosta Reuss, Sitz. Akad. Wiss. Wien, vol. 44, pt. 1, 1861 (1862), 

 p. 305, pi. 1, fig. 1; vol. 46, pt. 1, 1862 (1863), p. 331, pi. 5, fig. 63.— H. B. 

 Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 464, pi. 57, figs. 31, 

 32; pi. 58, figs. 20 (?), 21.— H. B. Brady, Parker, and Jones, Trans. Zool. 

 Soc. London, vol. 12, 1888, p. 222, pi. 44, figs. 26, 31.— Egger, Abh. kon. 

 bay. Akad. Wiss. Munchen, 01. n, vol. 18, 1893, p. 329, pi. 10, figs. 47, 48, 

 82, 83.— Sidebottom, Journ. Quekett Micr. Club, vol. 11, 1912, p. 388, pi. 

 15, fig. 22. 



Description. — Test subglobular to pyriform, broadest toward the 

 base and gradually tapering upward toward the apex; apertural end 

 of the test smooth and unornamented, lower portion with compara- 

 tively few, thin, much elevated costse running to the apical end of 

 the test; aperture rounded. 



Length 0.25 to 0.50 mm. 



Distribution. — Brady mentions the occurrence of this species in the 

 North Pacific. From the material I have been able to examine the 



89977°— Bull. 71, pt. 3—13 3 



