38 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



especially the last few chambers; aperture a small arched opening 

 ven tr ally from the periphery of the chamber. 

 Diameter 0.40-0.75 mm. 



Distribution. — Bagg re- 

 cords the only previously 

 published station for this 

 species in theNorth Pacific, 

 Albatross H4571 in 384 

 fathoms off the Hawaiian 

 l VsJ c Islands. I have had speci- 

 fig. 40.— truncatuhna dutemplei (d'orbigny). (Adapted mens reierable to this 



FROM D'ORBIGNY'S TYPE FIGURE.) a, VENTRAL VIEW; 6, DOR- SPedeS frOm tWO NerO 



sal view; c, side view. 1 



stations, 1294 in 1,41 7 fath- 

 oms and 1,310 in 518 fathoms between Guam and Japan. It has 

 also occurred at Albatross station H4882 in 248 fathoms, bottom 

 temperature 48.8° F., off Blake Reef, in Colnett or Vincennes Strait, 

 Southern Japan. 



TRUNCATULINA TUMIDTJLA H. B. Brady. 



Plate 15, fig. 3. 



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

 p. 666, pi. 95, figs. Sa-d. 



Description. — "Test trochoid, more or less depressed, consisting of 

 three convolutions, the last of which is composed of about six seg- 

 ments ; superior face highly convex ; inferior less convex, slightly exca- 

 vated at the umbilicus ; peripheral edge thick and lobulated ; segments 

 inflated, especially those of the final convolution. Colour deep brown, 

 except the terminal segment, which is generally of fighter hue. 



"Diameter l/30th inch (0.2 mm.)." 



Distribution. — Brady described this small species from a Challenger 

 station near the Canaries. I have had material from two Nero 

 stations between Guam and Japan that very closely resemble the 

 figures of T. tumidula and seem to be identical with it. These are 

 Nero stations 1160 in 1,907 fathoms and 1294 in 1,417 fathoms. 



TRUNCATULINA PYGMEA Hantken. 



Truncatulina pygmea Hantken, Mitth. Jahrb. ung. geol. Anstalt., vol. 4, 1875, p. 

 78, pi. 10, fig. 8. 



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

 p. 666, pi. 95, figs. 9, 10. — Egger, Abh. kon. bay. Akad. Wiss. Munchen, 

 CI. ii, vol. 18, 1893, p. 400, pi. 16, figs. 24, 28, 29.— Chapman, Trans. New 

 Zealand Inst., vol. 38, 1906, p. 103.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 

 1908, p. 158.— Chapman, Journ. Linn. Soc. Zoology, vol. 30, 1910, p. 421. 



Description. — Test free, biconvex; peripheral margin bluntly 

 rounded; chambers numerous, angled on the dorsal side, about nine 

 in the last-formed whorl; sutures very distinct, limbate, especially 

 on the dorsal side with clear shell material, most distinct in the last- 



