FORAMINIFEKA OF NORTH PACIFIC OCEAN". 11 



LAGENA GRACILLIMA (Seguenza). 



Plate 1, fig. 4. 



Amphorina gracilis Costa, Atti Accad. Pontiniana, vol. 7, 1856, p. 121, pi. 11, 

 fig. 11. 



Amphorina gracillima Seguenza, Foram. mon. Mioc. Messina, 1862, p. 51, pi. 1, 

 fig. 37. 



Lagena gracillima Jones, Parker, and H. B. Brady, Pal. Soc. Mon., vol. 19, 

 1866, p. 45, pi. 1, figs. 36, 37.— H. B. Brady, Ann. Mag. Nat. Hist., ser. 4, 

 vol. 6, 1870, p. 292, pi. 11, figs. 6a-c. — Butschli, in Bronn, Klassen und 

 Ordnungen Thier-Reichs, vol. 1, 1880, p. 197, pi. 7, fig. 20.— Fornasini, 

 Boll. Soc. Geol. Ital., vol. 2, 1883, p. 185, pi. 2, fig. 5— H. B. Brady, Rep. 

 Voy. Challenger, Zoology, vol. 9, 1884, p. 456, pi. 56, figs. 21, 22, 24-26 [19? 

 20? 23? 27? 28?].— Egger, Abh. kon. bay. Akad. Wiss. Miinchen, CI. n, vol. 

 18, 1893, p. 330, pi. 10, fig. 12— Goes, Kongl. Svensk. Vet. Akad. Handl., 

 vol. 25, No. 9, 1894, p. 75, pi. 13, fig. 729 (not 728, 730); Bull. Mus. Comp.' 

 Zool., vol. 29, 1896, p. 52.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 306, 

 pi. 53, fig. 3. — Silvestri, Mem. Pont. Accad. Nuovi Lincei, vol. 17, 1900, 

 p. 245, pi. 6, fig. 42. — Millett, Journ. Roy. Micr. Soc, 1901, p. 491. 



Lagena sulcata, var. distoma-polita Parker and Jones, Philos. Trans., vol. 155, 

 1865, p. 357, pi. 13, fig. 21; pi. 18, fig. 8. 



Lagena Ixvisr, var. gracillima Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, 1891 

 p. 478. 



Description. — Test much elongate, slender, broadest near the 

 middle, thence tapering toward either end and continued out into a 

 long slender tubular neck at each end, apertural end with a definite 

 rim at the apex when complete and the opposite end probably 

 closed in perfect specimens, delicate, wall thin and hyaline, smooth; 

 transparent. 



Length up to 1.5 mm. 



Distribution. — This species is recorded by Brady from three Chal- 

 lenger stations; 206 in 2,100 fathoms in the China Sea; 241 in 2,300 

 fathoms east of Japan; and 232 in 345 fathoms on the Hyalonema- 

 ground south of Japan. Goes records it from three Albatross sta- 

 tions off the west coast of America in 782, 1,132, and 1,832 fathoms. 

 In the material I have had the species has occurred in these same 

 two regions, Albatross D4775 in 584 fathoms and D4964 in 37 fathoms, 

 both off Japan, and Tuscarora station 9, in 980 fathoms off southern 

 California. 



Although this species is usually described as having an aperture at 

 both ends it seems to me that this is accidental, and that in perfect 

 specimens the aboral end will be found to be closed. Owing to the 

 extreme tenuity of the ends and the fragile character of the wall, 

 the perfect aperture with its prominent lip is seen in but a small 

 per cent of the specimens examined. This is apparently due to 

 breakage in handling the material. The same is probably true of 

 the aboral end, for no trace of a lip or other indication of a finished 

 end is noted either in specimens or figures of this species. The 



