36 BULLETIN" 71, UNITED STATES NATIONAL MUSEUM. 



The costse are thickest near the middle, and taper away toward the 

 ends." 



Length 0.25 mm. 



Distribution. — In the volumes on the "Summary of Results of the 

 Challenger Expedition" this species is recorded on page 965 from 

 station 246 in* 2, 050 fathoms, and on page 937 recorded with a question 

 from station 237. In many respects this is close to L. fasciata 

 Egger. 



LAGENA LUCIDA (Williamson). 



Entosolenia marginata, var. lucida Williamson, Ann. Mag. Nat. Hist., eer. 2, 

 vol. 1, 1848, p. 17, pi. 2, fig. 17. 



Lagena lucida Reuss, Sitz. Akad. Wiss. Wien, vol. 46, 1862 (1863), p. 324, pi. 2, 

 figs. 25, 26. — Balkwill and Millett, Journ. Micr., vol. 3, 1884, p. 80, pi. 2, 

 fig. 7; pi. 3, figs. 4, 5. — Millett, Journ. Roy. Micr. Soc, 1901, p. 494. — 

 Sidebottom, Mem. and Proc. Manchester Lit. and Philos. Soc, vol. 50, 

 No. 5, 1906, p. 6, pi. 1, figs. 9-12; vol. 54, No. 16, 1910, p. 17, pi. 2, fig. 7; 

 Journ. Quekett Micr. Club, vol. 11, 1912, p. 401, pi. 17, figs. 12-14. 



Description. — Test somewhat compressed, marginal portion and 

 central area clear and translucent, with a rather broad more or less 

 opaque band between, wall smooth, aperture usually fissurine or 

 rounded. 



Length 0.3 to 0.8 mm. 



Distribution. — At three North Pacific stations excellent specimens 

 of this species were found, Nero station 1464 in 891 fathoms off Guam; 

 1129 in 1,505 fathoms southeast of Japan; and Albatross H4881 in 

 316 fathoms off Japan. 



The specimens vary much in outline, one being very truncate and 

 broad at the apertural end, others rounded. 



LAGENA FASCIATA Egger, var. SPINOSA Sidebottom. 

 Lagena fasciata Egger, var. spinosa Sidebottom, Journ. Quekett Micr. Soc, 

 vol. 11, 1912, p. 402, pi. 17, figs. 16, 17. 



Description. — Test ovate, compressed, central portion ornamented 

 by two bands on each side nearly meeting at the apertural and 

 aboral ends; periphery with an apical and two lateral spines; 

 aperture fissurine, made up of a linear series of small openings. 



Length 0.5 mm. 



Distribution. — Sidebottom described this variety from the South 

 Pacific. The only station in the North Pacific from which I have 

 material is Albatross D4972 in 440 fathoms, bottom temperature 

 39.8° F. off Japan. 



This is similar to the specimen figured here as L. stapliyUearia, 

 but that lacks the characteristic ornamentation of L. fasciata. 



LAGENA FASCIATA Egger, var. CARINATA Sidebottom. 

 Plate 21, fig. 1. 

 Lagena fasciata Egger, var. carinata Sidebottom, Mem. and Proc. Manchester 

 Lit. and Philos. Soc, vol. 50, No. 5, 1906, p. 7, pi. 1, fig. 17; Journ. Quekett 

 Micr. Club, vol. 11, 1912, p. 403, pi. 17, fig. 18. 



