70 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



ROTALIA PAPILLOSA H. B. Brady. 



Plate 31, fig. 1. 



Rotalia papillosa H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 

 708, pi. 106, figs. 9a-c— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 322, 

 pi. 76, fig. 2. — Millett, Journ. Roy. Micr. Soc, 1904, p. 505. 



Description. — "Test subglobular, slightly compressed; both faces 

 highly convex, periphery obtuse and rounded; composed of three or 

 four convolutions, the last of which has 12 to 14 segments. Sutures 

 limbate; marked externally either by interrupted raised lines, or 

 more frequently by single or double rows of exogenous beads. 

 Umbilical hollow filled with clear shell-substance, the exterior of which 

 is granulated irregularly fissured. Aperture an arched cleft at the 

 inner margin of the inferior face of the final segment, near the 

 periphery. 



"Diameter l/20th inch (1.27 mm.)." 



Distribution. — Brady records this species from one North Pacific 

 station, Hong Kong harbor in 7 fathoms. I have had several 

 typical specimens from Hong Kong harbor also. It has occurred as 

 numerous fine specimens at Albatross station D4874 in 66 fathoms, 

 eastern channel of Korea Strait. Although the bottom temperature is 

 not given for this station that of surrounding stations runs fairly high 

 and numerous southern species occur here. 



This is a beautifully ornamented species and very easily identified. 



ROTALIA PAPILLOSA H. B. Brady, var. COMPRESSIUSCULA H. B. Brady. 

 Plate 30, fig. 1. 



Rotalia papillosa H. B. Brady, var. compressiuscula H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 708, pi. 107, figs, la-c; pi. 108, figs. 

 la-c. — Chapman, Trans. New Zealand Inst., vol. 38, 1905, p. 106; Journ. 

 Quekett Micr. Club., ser. 2, vol. 10, 1907, p. 139. 



Description. — "General character similar to those of Rotalia papil- 

 losa, but the test much more compressed and the periphery sharply 

 angular. 



"Diameter l/25th inch (1 mm.)." 



Distribution. — Among the original stations for this species Brady 

 records two from the North Pacific, off the Philippines in 95 fathoms 

 and Inland Sea of Japan in 14 fathoms. 



I have had specimens from the Inland Sea of Japan collected by 

 Dale and Jouy in 1881 and numerous specimens of the variety with 

 the typical at Albatross station D4874 in 66 fathoms, eastern channel 

 of Korea Strait. 



At the latter station it was very easy to distinguish between the 

 variety and the typical form especially in size, as well as in the more 

 distinct ornamentation and greater compression of the variety. 



