18 



BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



the umbilicus or with lines of closely set granules, sometimes with 

 larger tubercles near the center. 



Diameter about l/70th inch (0.36 mm.). 



Distribution. — This species was described by Brady from shallow 

 water dredgings among the islands of the South Pacific. The only 

 North Pacific record is that given by Rhumbler, 

 who found it in material from shallow water of 

 Laysan Island. 



DISCORBIS TABERNACULARIS (H. B. Brady). 



Plate 5, fig. 4. 



Discorbina tabernacularis H. B. Brady, Quart. Journ. Micr. 

 Sci., vol. 21, 1881, p. 65; Rep. Voy. Challenger, Zool- 

 ogy, vol. 9, 1884, p. 648, pi. 89, figs. 5-7.— Egger, 

 Abh. kon. bay. Akad. Wiss. Munchen, CI. n, vol. 18, 

 1893, p. 390, pi. 15, figs. 58-60, 79.— Millett, Journ. 

 Roy. Micr. Soc, 1903, p. 700.— Rhumbler, Zool. 

 Jahrb , Abt. Syst., vol. 24, 1906, p. 69.— Sidebottom, 

 Mem. and Proc. Manchester Lit. and Philos. Soc, 

 vol. 52, No. 13, 1908, p. 15; vol. 54, No. 16, 1910, p. 25, 

 pl. 3, fig. 12. 



Description. — ' ' Test free ; contour that of a tall 

 cone with somewhat convex sides and more or less 

 concave base, often deeply sunken at the umbilicus. 

 Segments long, oblique, arranged in about three 

 convolutions; the septal lines of small or imma- 

 ture specimens limbate externally, those of larger 

 shells concealed by the general thickening of the 

 Inferior surface ornamented 

 c, doksal view. (Adapt- w j^h radiating striae or crenulations ; superior with 



ed from Brady.) . ° r 



striae or irregular costae radiating from the apex. 



"Diameter l/100th inch (0.25 mm.) or less." 



Distribution. — This is another species found in the shallow water 

 about tropical islands. Brady records it from the coral reefs off 

 Honolulu, Hawaii, at a depth of 40 fathoms. Rhumbler records 

 it from shallow water material off Laysan Island. I have had no 

 shallow water material which would be apt to contain this species 

 and so have no records for it from this area. 



DISCORBIS OPERCULARIS (d'Orbigny). 



Plate 11, fig. 3. 



Rosalina opercularis d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 271, No. 7; in 

 De la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, "Foraminiferes," p. 101, pl. 3, 

 figs. 24, 25; pl. 4, fig. 1. 



Fig. 20.— Discorbis ta- 

 bernacularis (H. B. 

 Brady). X 100. a, side 



view; b, ventral view; Walls oi the test 



