TROPICAL PACIFIC FORAMINIFERA OF ALBATROSS 77 



Holotijpe.— U.S.N. M. No. 14626, from Rangiroa. 



This species differs from the other known ones of the genus in 

 having the whorls almost completely involute, especially in the later 

 development. A few specimens seem to show that the earliest cham- 

 bers are more open. The ventral side seems to be almost completely 

 involute with a very slight umbilical depression, the dorsal side 

 flattened or slightly convex. As far as our material shows, this is 

 the commonest species of the genus in the South Pacific. It is 

 abundant at the type locality, and also occurs at Rutavu; Makemo 

 Lagoon, Paumotus; inside lagoon, Pinaki Atoll; beach off wharf, 

 Hereheretue; and from Albatross Station H3933, latitude 20° 02' 

 S., longitude 144° 28' W., Paumotus. 



Family TROCHAMMINIDAE 



Subfamily Trochammininae 



Genus TROCHAMMINA Parker and Jones, 1860 



TROCHAMMINA TURBINATA (H. B. Brady) 



Plate 17, Figures 8 a, 6 



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

 p. 50, 1881 ; Rep. Voy. Challenger, Zoology, vol. 9, p. 312, pi. 35, figs. 9o-c, 

 1884. 



Trochammina turbinatum Eimer and Fickert, Zeitschr. Wiss. Zool., vol. 65, p. 695, 

 1889 —Cushman, U. S. Nat. Mus. Bull. 104, pt. 2, p. 81, pi. 17, fig. 2, 1920 ; 

 Bull. Scripps Inst. Oeeanogr., Tech. Ser., vol. 1, no. 10, p. 142, 1927.— 

 Cushman and Mover, Contr. Cushruan Lab. Foram. Res., vol. 6, p. 53, pi. 7, 

 fig. 10, 1930. 



Test spiral, early portion regular, low spired, last-formed whorl in 

 the adult often becoming oblique ; chambers 5 to 8 in the last whorl, 

 umbilicate ; wall arenaceous, usually smoothly finished, cement yellow- 

 ish brown; aperture a narrow slit at the base of the ventral side of 

 the chamber. Diameter, 0.35 mm. ; thickness, 0.18 mm. 



The only specimens of this species are from Albatross Station 

 H3973, latitude 5° 20' S., longitude 169° 43' W., in 2,411 fathoms. 



Subfamily Globotextulariinae 



Genus NOURIA Heron-Allen and Earland, 1914 



Nouria Heron-Allen and Earland, Trans. Zool. Soc. London, vol. 20, pt. 12, 

 p. 375, 1914.— Cushman, Smithsonian Misc. Coll., vol. 77, no. 4, p. 30, 1925 ; 

 Cushman Lab. Foram. Res. Spec. Publ. no. 1, p. 174, 1928. 



Genotype. — By designation, Nouria polymorphinoides Heron- 

 Allen and Earland. 



