FOBAMINIFERA OF NORTH PACIFIC OCEAN. 123 



fathoms near the Galapagos Islands; Hi 521, in 462 fathoms, off the 

 west coast of the United States; D4998, in 66 fathoms, in the Gulf of 

 Tart ary off Sakalin Island; and D4979, in 943 fathoms, 

 off Japan. Specimens were found from four Nero sta- 

 tions, 1139, 1147, 1184, and 1306, in 1,208-2,101 fathoms, 

 between Yokohama and Guam. 



There is a considerable variation in the texture of the 

 specimens included here, but all have the same general 



characters FlG - 1S9 -- Tr °- 



tiiaiaui-eia. ^ chammina 



Goes figured and described a variety which he named turbinata. 



JLiplovliraqmium turbinatum , var. helicoideum Goes. x 3o ' FROM 



1 • • • 1 • 1 1 1 I 1 /~l -1 PHOTOGRAPH. 



Upon looking up the original series labeled by Goes with 

 this name I find among the Pacific material a very much mixed series 

 of tests. In all, there are ten Pacific specimens, none of which at all 

 resembles the figures given by Goes. 



TROCHAMMINA NANA (H. B. Brady). 



Ilaplophragmium nanum H. B. Brady, Quart. Journ. Micr. Sci., vol.21, 1881, p. 

 50; Denkschr. kais. Akad. Wise. Wien, vol. 43, 1881, p. 99, pi. 2, figs. 1, a-e; 

 Ann. Mag. Nat. Hist., ser. 5, vol. 8, 1881, p. 406, pi. 21, fig. 1; Rep. Voy. Chal- 

 lenger, Zoology, vol. 9, lS84,p. 311, pi. 35, figs. 6-8.— H.B. Brady, Parker, 

 and Jones, Trans. Zool. Soc. London, vol. 14, 1888, p. 218, pi. 41. fig. 20.— 

 Chapman, Journ. Roy. Micr. Soc, 1892, p. 324, pi. 5, fig. 15.— Egger, Abh. 

 kon. bay. Akad. Wiss. Munchen, vol. 18, 1893, p. 262, pi. 5, figs. 13-15.— 

 Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, No. 9, 1894, p. 22, pi. 5, 

 figs. 124-127.— Millett, Journ. Roy. Micr. Soc, 1899, p. 360, pi. 5, fig. 9.— 

 Rhumbler, Zool. Jahrb., vol. 24, 1906, p. 65, pi. 5, fig. 56.— Bagg, Proc 

 U. S. Nat. Mus., vol. 34, p. 127. 



Description. — Test trochoid-spiral, spire very low, consisting of 

 two or more volutions, the last-formed one with six to eight chambers, 

 somewhat flattened above but usually rotund below, very slightly 

 or not at all umbilicate, chambers all visible from the dorsal side, 

 only those of the last-formed volution visible from the ventral side; 

 walls composed of sand grains and a large amount of cement, surface 

 fairly smooth ; aperture an arched slit at the periphery and ventral edge 

 of the chamber where it is in contact with the adjacent chamber of 



r^j^^ the preceding volution; color 



\ Qct~/ iyL^ formed chamber often gray. 



*■- " 190 ^Sl-*-- i9i V.J ju^ 192 Distribution. — Brady men- 

 figs. 190-192.— trochammixa nana, x 35. from pho- tions but one Challenger sta- 

 tion for this species, 253, in 

 3,125 fathoms, but in the volume on the "Summary of Results" two 

 other stations afe added, 246, in 2,050 fathoms, and 237, in 1,875 fath- 

 oms, the last with a question mark. Rhumbler records a single young 

 specimen from Laysan Island. Bagg records it from a single Albatross 

 station, H4694, m 865 fathoms, off the Hawaiian Islands. I found 

 several specimens in material from Nero station 992, in 1,013 fathoms, 

 off Guam. 



