34 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



TRUNCATULINA WUELLERSTORFI (Schwager). 



Plate 12, fig. 3. 



Anomalina wuellerstorfi Schwager, Novara Exped., geol. Theil., vol. 2, 1866, p. 



258, pi. 7, figs. 105, 107. 



Truncatulina vruellerstorfi H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 



1884, p. 662, pi. 93, figs. 8, 9.— Uhlig, Jahrb. k. k. geol. Reichs., vol. 36, 1886, 



p. 174, fig. 3. — Egger, Abh. kon. bay. Akad. Wiss. Munchen, CI. n, vol. 18, 



1893, p. 397, pi. 16, figs. 13-15.— Chapman, Journ. 



Boy. Micr. Soc, 1893, p. 3, pi. 1, fig. 3.— Flint, Rep. 



U. S. Nat. Mus., 1897 (1899), p. 333, pi. 77, fig. 1 — 



Millett, Journ. Roy. Micr. Soc, 1904, p. 492. — 



Chapman, Trans. New Zealand Inst., vol. 38, 1905, 



p. 102.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, 



p. 159. — Chapman, Proc. Roy. Soc. Victoria, vol. 



22, 1910, p. 285; Journ. Linn. Soc, Zoology, vol. 30, 



1910, p. 420— Bagg, Bull. U. S. Geol. Surv., No. 



513, 1912, p. 84, pi. 25, figs. lOo-c, lla-c. 



Planorbulina wuellerstorfi Goes, Kongl. Svensk. Vet. 



Akad. Handl., vol. 25, No. 9, 1894, p. 89, pi. 15, fig. 



777. 



Description. — Test usually free, much com- 

 pressed, dorsal side slightly convex, ventral side 

 flattened; chambers numerous, elongate, curved, 

 9 or 10 in the last formed coil; sutures limbate; 

 periphery usually bluntly rounded; wall very 

 coarsely punctate; aperture a curved, arched 

 opening at the periphery of the chamber. 

 Diameter up to 1.40 mm. 



Distribution. — From the available records this 

 seems to be one of the most common species in 

 the North Pacific. Brady in the Challenger Re- 

 port records it from three North Pacific stations 

 in 345 to 2,050 fathoms. Goes records it from 

 seven Albatross stations in the western tropical Pacific at depths 

 ranging from 660 to 1,201 fathoms. Flint records it from Alba- 

 tross station D2805 in 51 fathoms in Panama Bay. Bagg records it 

 from 14 out of 19 Albatross stations off the Hawaiian Islands, depths 

 ranging from 275 to 1,544 fathoms. 



I have had material of this species from many stations well scattered 

 over the North Pacific; from off the coast of Washington, Albatross 

 D3346 in 786 fathoms, common; off the Galapagos D2806 in 1,379 

 fathoms, off the Hawaiian Islands between the Hawaiian and Midway 

 Islands and especially at a larger number of stations between Guam 

 and Yokohama. These last stations range in depth from 665 to 

 2,391 fathoms. 



Fig. 30.— Trunc atulina 

 "wuellerstorfi (schwa- 

 GER). Adapted from 

 Schwager.) a, dorsal 

 view; b, ventral view; 

 c, side view. 



