90 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



POLYMORPHINA ELEGANTISSIMA Parker and Jones. 



Plate 38, fig. 1. 



Polymorphina elegantissima Parker and Jones, Philoe. Trans. Roy. Soc, vol. 

 155, 1865, p. 438. — H. B. Brady, Parker, and Jones, Trans. Linn. Soc, 

 vol. 27, 1870, p. 231, pi. 40, fig. 15a-c— H. B. Brady, Rep. Voy. Challenger, 

 Zoology, vol. 9, 1884, p. 56G, pi. 72, figs. 12-15— Flint, Rep. U. S. Nat. Mus., 

 1897 (1899), p. 319, pi. 67, fig. 4.— Millett, Journ. Roy. Micr. Soc, 1893, p. 

 263.— Chapman, Journ. Quekett Micr. Club, 1907, p. 132, pi. 10, fig. 3; 

 Proc Roy. Soc. Victoria, vol. 22, 1910, p. 280. 



Description. — Test ovate, initial end broad and rounded, apical end 

 tapering, bluntly pointed, end view often subtriangular; chambers 

 few but unequally biserial; wall smooth, sutures not depressed but of 

 a darker color; aperture radiate, prolonged. 



Length up to 1 mm. 



Distribution. — This is evidently a tropical or subtropical species 

 of comparatively shallow waters. It has been obtained in the Aus- 

 tralian and the East Indian region. In the North Pacific Brady 

 records it from Hongkong Harbor, 7 fathoms. I have had specimens 

 collected from the Inland Sea of Japan, depth not given. 



The arrangement of chambers in this species is peculiar for the 

 genus, the biserial arrangement being oblique, so that the last-formed 

 chamber on one side of the test covers all previously added chambers 

 of that side and on the other side leaves the other set exposed. In 

 this way there are a number of chambers visible from either side of 

 the test. 



POLYMORPHINA LONGICOLLIS H. B. Brady. 

 Plate 41, figs. 1-3. 



Polymorphina lanceolata Reuss (part), Sitz. kon. Akad. Wiss. Wien, vol. 62, 1870, 

 p. 487, No. 12. — von Schlicht, Forarn. Pietzpuhl, 1870, pi. 31, figs. 25-28, etc. 



Polymorphina longicollis H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, 

 p. 64; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 572, pi. 73, figs. 18, 19. 



Description. — Test fusiform; chambers few, smooth inflated, espe- 

 cially the last-formed one, sutures but slightly excavated; surface 

 more or less hispid, the last-formed chamber spinose; aperture with 

 an elongate neck, often irregular, sometimes with a radiate lip. 



Length about 0.75 mm. 



Distribution. — This species has not previously been recorded for 

 the North Pacific. I have had material from Nero station 2061 in 

 1,670 fathoms off the Hawaiian Islands and Nero station 1319 in 

 2,167 fathoms between Guam and Japan. 



This seems to be essentially a deep-water species, the stations given 

 by Brady averaging about this same depth. 



A fistulose form which is hispid throughout and evidently belongs 

 to this species was found at Nero station 1063, in 1,884 fathoms, 

 in the line of soundings between Guam and Japan. It is here figured. 



