FORAMINIFERA OF NORTH PACIFIC OCEAN. 



51 



. ..' ■ 



WEBBINELLA HEMISPHiERICA (Jones, Parker, and H. B. Brady). 



Webbina hemisphserica Jones, Parker, and H. B. Brady, Pal. Soc. Monogr.. 1865, 

 p. 27, pi. 4, fig. 5.— Robertson, Rep. Brit. Ass., 1875, p. 189: — H. B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 350, pi. 41, fig. 11.— Egger, 

 Abh. kon. bay. Akad. Wiss. Miinchen, vol. 18, 1893, p. 266, pi. 14, figs. 1-3.— 

 Cushman, Proc. Boston Soc. Nat. Hist., vol. 34, 1908, p. 24. 



Placopsilina bulla Goes (part), Kongl. Svensk. Vet. Akad. Handl., vol. 25, no. 

 9, 1894, p. 28, pi. 6, figs. 211, 212 (not figs. 213-215). 



Psammosphxra kemisphxrica Eimer and Fickert, Zeitschr. wiss. Zool., vol. 65, 

 1899, p. 671. 



Webbinella hemisphxrica Rhumbler, Arch. Protistk., vol. 3, 1903, p. 228, fig. 54 

 (in text). 



Description. — Test adherent, circular in outline when seen from 

 above, central portion convex, surrounded by a flattened border of 

 varying width, chamber single, un- 

 divided, wall composed of sand grains 

 with much cement, nearly smooth 

 outside, more or less roughened 

 within; aperture not visible, the re- 

 gion of attachment serving for the 

 egress of the pseudopodia about its 

 edge ; color grayish-white or brownish. 



Diameter 0.5-1.5 mm. 



Distribution. — The two specimens 

 which I have found in the Albatross 

 material from the Northwest Pacific 

 are the only records for this region. 

 Single specimens attached to shell 

 fragments were found, one at Alba- 

 tross station D4874, in 66 fathoms in Korea Strait, near Japan, the 

 other at D4900, in 139 fathoms in the Eastern Sea of Japan. 



Genus AMMOSPH^IROIDES, new genus. 



Description. — Test irregularly subglobular, composed of an elongate 

 or subspherical chamber with double apertures typically ; wall finely 

 arenaceous with a large proportion of reddish-brown cement, aper- 

 tures at the end of short tubular portions of the test. 



Type of the genus. — Ammosphxroides distoma, new species. 



The peculiar rusty appearance of the test and the double apertures 

 at once separate this from any allied arenaceous forms. 



Fig. 56.— Webbinella hemispilerica, at- 

 tached to a fragment of shell, X 50. 

 a, from side; b, from above. 



AMMOSPHiEROIDES DISTOMA, new species. 



Description. — Test irregular, subglobular or with deep depressions 

 of the surface, irregularly made up of two portions, each of which 

 possesses an aperture; wall finely arenaceous, the outer portion flaking 



