12 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



complete apertural end is shown in the accompanying figure and in 

 the figure given by Parker and Jones (pi. 18, fig. 8). There may be 

 gradations between this species and Lagena elongata, but as far as 

 seen L. gracillima has the main portion of the test decidedly fusi- 

 form, while in L. elongata the sides are usually nearly parallel for a 

 considerable portion of their length. 



The specimen figured by Flint, which in his figure (pi. 53, fig. 3) 

 is shown as the second specimen from the left side, is the most per- 

 fect I have seen and shows the perfect apertural lip and the almost 

 perfect aboral end terminating in a very delicately pointed tip. 

 Some of the other specimens in this set had perhaps best be referred 

 to L. elongata. 



LAGENA ELONGATA (Ehrenberg). 

 Plate 1, fig. 5. 



Miliola elongata Ehrenberg, Bericht preuss. Akad. Wiss. Berlin, 1844, p. 274, 

 1845, p. 371; Mikrogeologie, 1854, pi. 25, fig. 1. 



Lagena elongata Tate and Blake, Yorkshire Lias, 1876, p. 454, pi. 18, figs. 9, 9a. — 

 H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 457, pi. 56, 

 fig. 29.— Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 75, 

 pi. 13, fig. 731.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 306, pi. 53, 

 fig. 1. — Millett, Journ. Roy. Micr. Soc, 1901, p. 492, pi. 8, fig. 10. — Chap- 

 man, Trans. New Zealand Inst., vol. 38, 1905, p. 91. 



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

 1884, pi. 56, figs. 27, 28.— Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 

 No. 9, 1894, pi. 13, figs. 728, 730 (not 729). 



Lagena vulgaris, var. distoma-polita Rymer-Jones (part), Trans. Linn. Soc. 

 London, vol. 30, 1875, p. 64, pi. 19, fig. 55. 



Description. — Test much elongate, slender, middle portion cylindrical 

 tapering gradually into slender tubular projections at either end, 

 apertural end when complete with a slightly projecting lip; wall thin 

 and hyaline, smooth; transparent. 



Length up to 2.5 mm. 



Distribution. — This species does not seem to be recorded from the 

 North Pacific. I have found specimens in but two regions in the mate- 

 rial I have examined, Albatross H4025 in 536 fathoms in Bering Sea and 

 several stations off Japan, depths varying from 44 to 649 fathoms, 

 average 308 fathoms, and bottom temperatures varying from 38.1° F. 

 to 39.9° F. In none of these cases was L. gracillima present. 



As usually considered, this species is cylindrical in the middle, with 

 nearly parallel sides for a considerable distance, instead of fusiform 

 from the middle as in L. gracillima. In rare cases the apertural lip 

 seems to be preserved, but usually specimens are broken close back to 

 the stouter cylindrical portion. 



