250 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



CRISTELLARIA TENUIS (Bornemann). 



Plate 50, fig. 2, 



Marginulina tenuis Bornemann, Zeitsclir. deutsch. geol. Ges., vol. 7, 1855, p. 



326, pi. 13, fig. 4. 

 Cristellaria tenuis Reuss, Sitz. Akad. AViss. Wien, vol. 62, 1870, p. 479, No. 1. — 



H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 535, pi. 66, figs. 



21-23.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 315, pi. 61, fig. 2. 

 Cristellaria perprocera Schwager, JVb-yara-Exped., Geol. Tlieil., vol. 2, 1866, p. 



241, pi. 6, fig. 84. 



Description. — Test very long and slender, composed of a large 

 number of chambers ; early portion of the test compressed and coiled, 

 the later portion becoming early uncoiled and gradually losing the 

 compression until the final chambers are cylindrical and nodosarian; 

 sutures of the early portion not incised, those of the later portion 

 rather deeply constricted; wall smooth, aperture in the last-formed 

 chamber, central, terminal, radiate. 



Length up to 3.5 mm. 



Distribution. — Specimens occurred at the following Albatross sta- 

 tions in the area: D5269, in 220 fathoms (403 meters), off Batangas 

 Bay; D5301, in 208 fathoms (381 meters) , China Sea, off Hongkong, 

 bottom temperature 50.5° F. (10.2° C.) ; D5312, in 140 fathoms 

 (250 meters), bottom temperature 57.5° F. (14.2° C); also off Hong- 

 kong, D5622, in 275 fathoms (503 meters), between Gillolo and 

 Makyan Islands; and D5648, in 559 fathoms (1,021 meters), Buton 

 Strait. 



The specimens I have had from this area are much like the speci- 

 mens figured by Brady, perhaps more like them than like the other 

 figures referred to above. 



Cristellaria tenuis — Material examined. 



CRISTELLARIA HELICINA Cushman. 



Plate 51, figs. 4 a, b. 

 Cristellaria helicina Cushman, Proc. U. S. Nat. Miis., vol. 51, 1917, p. 660. 

 Description. — Test unequally convex, close-coiled, chambers nu- 

 merous, on one side coming to the umbilicus or nearly so, on the 

 other coming only little farther than the periphery of the previous 



