FORAMINIFERA OF THE NORTH PACIFIC OCEAN. 



41 



TRUNCATULINA CULTER (Parker and Jones). 

 Plate 16, fig. 1. 



Planorbulina culler Parker and Jones, Philos. Trans., vol. 155, 1865, p. 421, 

 pi. 19, fig. 1 a, b. 



Truncatulina culler H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 668, pi. 96, fig. 3 a-c. — Egger, Abh. kon. bay. Akad. Wiss. Munchen, 

 CI. ir, vol. 18, 1893, p. 401, pi. 16, figs. 16-18— Bagg, Proc. U. S. Nat. Mus., 

 vol. 34, 1908, p. 157.— Chapman, Journ. Linn. Soc., Zoology, vol. 30, 1910, 

 p. 421. 



Description. — Test free, ventrally strongly convex, dorsally flat- 

 tened or very slightly convex; peripheral margin acute, often carinate, 

 slightly fimbriate; chambers numerous, oblique 

 above, ten or more in the final whorl; sutures 

 limbate, in the earlier whorls becoming very 

 much thickened, in the later ones less so; sur- 

 face of the test finely punctate; sutures rather 

 indistinct below; aperture an arched or almost 

 comma-shaped opening at the inner margin of 

 the chamber about half way between the periph- 

 eral margin and the umbilicus. 



Diameter 0.40-0.80 mm. 



Distribution. — The only North Pacific records 

 for this species are those given by Bagg, 

 Albatross H4502 in 1,342 fathoms and H4567 

 in 1,307 fathoms off the Hawaiian Islands. I 

 have had no material which I could refer to this 

 species. 



Fig. 44.— Truncatulina 

 culter Parker .and 

 Jones. (Adapted from 

 Parker and Jones's 

 type figure.) x 25. 



a, DORSAL VIEW; C, SIDE 

 VIEW. 



TRUNCATULINA MUNDULA H. B. Brady, Parker, and Jones. 

 Plate 13, fig. 4. 



Truncatulina, sp. H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



pi. 95, fig. 6. 

 Truncatulina mundula H. B. Brady, Parker, and Jones, Trans. Zool. Soc. 



London, vol. 12, 1888, p. 228, pi. 45, fig. 25.— Bagg, Proc. U. S. Nat. Mus., 



vol. 34, 1908, p. 158. 

 Planorbulina mundula Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 71. 



Description. — Test free, almost equally biconvex; peripheral margin 

 acutely rounded; chambers numerous, 12 to 14 in the last-formed coil; 

 sutures oblique dorsally; margins of chambers of clear shell material, 

 raised and thickened in the earlier coils, almost hiding the original 

 surface of the chamber and broad even in the last-formed chambers, 

 remainder of the surface distinctly foraminated; ventral side with 

 the sutures indistinct, with little or no trace of thickenings; walls 

 very coarsely foraminated; aperture a narrow slit extending ventrally 

 from the peripheral margin. 



