PORAMINIFERA OP THE NORTH PACIFIC OCEAN. 45 



ANOMALINA GROSSERUGOSA (GUmbel). 

 Plate 20, fig. 1. 



Truncatulina grosserugosa Gumbel, Abh. kais. bay. Akad. Wiss., vol. 10, 1868, 



p. 660, pi. 2, fig. 104. — Terrigi, Mem. Accad. Lincei, ser. 4, vol. 6, 1889, 



p. 117, pi. 8, fig. 5. 

 Anomalina grosserugosa H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 673, pi. 94, figs. 4, 5. — Sherborn and Chapman, Journ. Roy. Micr. Soc, 



1889, p. 487, pi. 11, fig. 34. — Burrows, Sherborn, and Bailey, Journ. 



Roy. Micr. Soc, 1890, p. 563, pi. 11, fig. 25— Egger, Abh. kon. bay. Akad. 



Wiss. Munchen, CI. h, vol. 18, 1893, p. 378, pi. 14, fig. 4-6.— Burrows and 



Holland, Proc. Geol. Ass., 



vol. 15, 1897, p. 48, pi. 2, 



fig. 26.— Bagg, Bull. U. S. 



Geol. Survey, No. 88, 1898, 



p. 67, pi. 6, fig. 4.— Flint, 



Rep. U. S. Nat. Mus., 1899, 



p. 335, pi. 78, fig. 5— Chap- 

 man, Proc. California Acad. 



Sci., ser. 3, Geol., vol. 1, 



1900, p. 253, pi. 30, fig. 9.— " & . 



Schubert, Zeitschr. 



, , . ~, T , Fig. 50.— Anomalina grosserugosa Gumbel. (Adapted 



deutscn. geol. Ues., Janrg., FEOM GOm bel's figure of the type.) a, ventral 



1901, p. 21, figs. 5, 6. — Mil- view; 6, side view; c, dorsal view. 

 lett, Journ. Roy. Micr. 



Soc, 1904, p. 495.— Bagg, Proc. U. S. Nat. Mus. vol. 34, 1908, p. 160.— 

 Chapman, Proc. Roy. Soc. Victoria, vol. 22, 1910, p. 286; Journ. Linn. Soc, 

 Zoology, vol. 30, 1910, p. 421.— Bagg, Bull. U. S. Geol. Survey, No. 513, 

 1912, p. 85, pi. 26, fig. 1-6. 



Description. — Test nautiloid, dorsal side somewhat concave, 

 ventral side somewhat convex ; chambers numerous, in three or more 

 coils, all chambers visible from the dorsal side but only those of the 

 final coil visible on the ventral face, usually seven chambers in the 

 last formed coil; chambers somewhat inflated; sutures depressed, 

 in face view broad; periphery broadly rounded; surface coarsely 

 perforate, usually more so on the ventral side; aperture a narrow 

 curved slit at the base of the chamber. 



Diameter 1 mm. or more. 



Distribution. — Brady gives two Challenger stations in the North 

 Pacific for this species in 345 and 2,050 fathoms. Goes records it 

 under the name Planorbulina rudis from two Albatross stations D3371 

 in 770 fathoms and D3375 in 1,201 fathoms off the west coast of trop- 

 ical America. Bagg records it from numerous stations off the 

 Hawaiian Islands at depths ranging from 367 to 1,544 fathoms. I 

 have had it from numerous Nero stations between Guam and Japan 

 and in the Albatross material from off Japan at depths ranging from 

 253 to 1,817 fathoms. 



As far as the North Pacific material is concerned this is the most 

 common species of the genus in the region. 



