70 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



TRILOCULINA SUBORBICULARIS d'Orbigny. 

 Plate 21, fig. 3. 



Quinqueloculina suborbicularis D'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 302, 



No. 29. — Scbxtjmberger, Mem. Soc. Zool. France, 1893, p. 215, text figs. 



26-28; pi. 2, figs. 63, 64; pi. 3, fig. 67. 

 Triloculina suborbicularis D'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 300, No. 12; 



in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, "Foraminiferes," p. 177, 



pi. 10, figs. 9-11. 



Description. — Test suborbicular, much compressed laterally, 

 breadth as great or greater than the length, chambers rounded on the 

 peripheral margin, wall longitudinally striate, earliest ones smooth, 

 aperture subcircular with a flattened lip, tooth simple, semicircular 

 at some distance in front of the aperture itself, apparently on the 

 chamber of the preceding coil. 



Diameter, usually less than 1 mm. 



Distribution. — Specimens closely approximating those figured by 

 Schlumberger were found at Nero station 2074 in 22 fathoms off the 

 Hawaiian Islands. These seem very different from the preceding 

 species. Most of the specimens were apparently still in their quin- 

 queloculine stage. 



TRILOCULINA DEPLANATA (Rhumbler). 



Plate 17, fig. 2. 



Miliolina deplanata Rhumbler, Zool. Jahrb., Abteil. Syst., vol. 24, 1907, p. 42, 

 pi. 3, figs. 23, 23a. 



Description. — -Test triloculine, elongate, elliptical, nearly twice as 

 long as broad, somewhat compressed; sutures very shallow and 

 delicate ; aperture an elongate slit, with a single somewhat prominent 

 tooth, slightly raised above the level of the apertural lip. 



Length, 0.24 to 0.45 mm. 



Distribution. — Rhumbler described this species from a few speci- 

 mens from Laysan. I have had no material strictly referable to it. 



TRILOCULINA LABIOSA d'Orbigny. 



Triloculina labiosa D'Orbigny, in De La Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 



"Foraminiferes" p. 157, pi. 10, figs. 12-14. 

 Miliolina labiosa H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 



170, pi. 6, figs. 3-5. 



Brady records this species from very deep water in the North 

 Pacific, the tests in the deepest water being completely siliceous. The 

 depths of these stations range from 2,050 to 3,950 fathoms. The 

 same species is recorded by Brady from Challenger station 260A in 40 

 fathoms, coral reefs of Honolulu, Hawaiian Islands. 



