72 BULLETIN 11, UNITED STATES NATIONAL MUSEUM. 



TRILOCULINA TERQUEMIANA (H. B. Brady). 



Plate 27, fig. 2. 



Miliolina terqucmiana II. B. Beady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 

 p. 166, pi. 114, figs, la, b. 



Description. — Test in the adult with three visible chambers, sharply 

 triangular in end view, the angles acute, surface ornamented by 

 longitudinal raised costae; aperture oval with a simple or bifid tooth, 

 narrow. 



Length, 0.5 to 1 mm. 



Distribution. — This species has not previously been reported from 

 the North Pacific, the Challenger collecting it only in shallow water 

 off Ceylon and shore sand from Madagascar. The only material I 

 have had from the North Pacific is from Hongkong Harbor, where 

 several specimens were obtained. 



This is similar to T. tricarinata with the addition of the costate 

 ornamentation and the difference in the apertural characters, which, 

 in the specimens figured in the Challenger report, were not mature. 



TRILOCULINA INSIGNIS H. B. Brady. 



Plate 27, fig. 3. 



Miliolina insignis H. B. Brady, Quart. Journ. Micr. Sci., vol. 21, 1881, p. 45; 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 165, pi. 4, figs. 8, 10. 



Description. — Test in the adult with three visible chambers, the 

 angles of the chambers usually rounded; test somewhat longer than 

 wide, surface ornamented by numerous longitudinal raised costae; 

 aperture nearly circular with a narrow bifid tooth. 



Length, about 1 mm. 



Distribution. — Brady records the species from a single North 

 Pacific station, Challenger 244 in 2,900 fathoms. From the vicinity 

 of the Hawaiian Islands I have found specimens numerous in material 

 from Nero 2039 in 24 fathoms, 2040 in 21 fathoms, and 2041 in 33 

 fathoms. 



TRILOCULINA LINNAEANA d'Orbigny. 

 Plate 27, fig. 4. 



Triloculina linnaeana d'Orbigny, in De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 



"Foraminiferes," p. 153, pi. 9, figs. 11, 13. 

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



p. 174, pi. 6, figs. 15-20. 



Description. — -Test typically with three visible chambers in the 

 adult, elongate, tapering toward either end, somewhat compressed, 

 surface ornamented by a few very prominent raised ridges with deep 

 concave depressions between; aperture rounded or slightly elliptical 

 with a single or bifid narrow tooth. 



Length, up to 2 mm. 



