TROPICAL PACIFIC FORAMINIFERA OF ALBATROSS 59 



Table 19. — Triloculina aflinis — material examined 



1 Key to abbreviations is given in Table 1. 



TRILOCULINA TRICARINATA d'Orbigny 



Plate 13, Figures 3 a, b 



Triloculina tricar inata d'Orbigny, Ann. Sci. Nat., vol. 7, p. 299, no. 7, 1826; 



Modules, no. 94, 1826.— H. B. Brady, Trans. Linn. Soc. London, vol. 24, p. 446, 



pi. 48, fig. 3, 1864.— Cushman, U. S. Nat. Mus. Bull. 104, pt. 6, p. 56, pi. 13, 



figs. 3 a-c, 1929. 

 Hiliolina tricarinata H. B. Brady, Rep. Voy. Challenger. Zoology, vol. 9, p. 165, 



pi. 3, figs. 17 en, b, 1884. 



Test in the adult with three visible chambers, the angles of the 

 chambers sharp, often almost carinate, whole test usually somewhat 

 longer than wide, in end view triangular, the sides straight ; sutures 

 distinct; wall smooth, often polished; aperture with a narrow bifid 

 tooth or variously angled in large specimens. Maximum length of 

 our specimens, 0.6 mm. ; diameter, 0.45 mm. 



As noted previously, this species, also like affinis, needs definite 

 sections to determine its early stages in relationships. I have in- 

 cluded here only those specimens that have very sharp angles and the 

 sides flat or slightly concave. There is apparently a difference in 

 the distribution between this and affinis, our specimens being mostly 

 from Albatross stations in deeper water, although rare specimens 

 have occurred at Mokaujar Anchorage; Vavau Anchorage, Tonga, 

 in 18 fathoms; and at Rongelap Atoll, Marshall Islands. 



Although there are a great many references to this species, they 

 are not given here, as so many things have been included under this 

 name that probably are not strictly to be included under one species. 

 91513—32 5 



