122 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



those of the inner volutions somewhat less inflated, all chambers visi- 

 ble from above, only those of the last-formed volution visible from 

 below, spire low; test umbilicate below; wall composed of fine sand 

 with an excess of cement, smooth, aperture small, a short arched slit 

 where the chamber meets the previous volution on the ventral side 

 and just in from the periphery; color yellowish-brown, the early 

 chambers of the spire often darker than the rest. 



Diameter 0.7-1 mm. 



Distribution. — There seem to be no published records for the occur- 

 rence of this species in the North Pacific. In the material that I 



a b 



Fig. 188.— Trochammina inflata. X 50. a, from above; b, from below. 



have examined it has been seen but once, from Nero station 1213, in 

 808 fathoms, off the coast of Japan. 



TROCHAMMINA TURBINATA (H. B. Brady). 



Haplophragmium turbinatum H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, 

 p. 50; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p'. 312, pi. 35. figs. 9, a-c— 

 Egger, Abh. kon. bay. Akad. Wiss. Munchen, vol. IS, 1S93, p. 262, pi. 5, 

 figs. 57-59. — Chapman, Proc. Zool. Soc. London, 1895, p. 16. 



Trochammina turbinatum Eimer and Fickert, Zeitschr. wiss. Zool., vol. 65, 

 1899, p. 695. 



Description. — Test spiral, early volutions regular, low spired, last- 

 formed volution in the adult somewhat irregular leaving the regular 

 method of coiling and becoming oblique; five to eight chambers in 

 the last-formed volution, umbilicate below, in adults with a depres- 

 sion above due to the obliquity of the last-formed volution; wall 

 arenaceous, variable in coarseness and amount of cement, aperture 

 a slit at the base of the ventral side of the chamber ; color yellowish 

 or reddish brown or grayish. 



Diameter 0.75-1.25 mm. 



Distribution. — Brady records this species from a single Challenger 

 station, 246, in 2,050 fathoms. In the material that I have examined 

 it has occurred at several stations: Albatross station D2806, in 1,379 



