70 BULLETIN 71, UNITED STATES NATIONAL MUSEUM. 



48.8° F. It also occurred at Tuscarora station 1, lat. 27° 7' N., and 

 long. 142° 7' E. in 73 fathoms. 



CRISTELLAR1A VARIABILIS Reuss. 



Plate 36, figs. 1-3. 



Cristellaria variabilis Reuss, Denkschr. Akad. Wiss. Wien, vol. 1, 1849, p. 369, 

 pi. 46, figs. 15, 16. — H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. '541, pi. 68, figs. 11-16.— H. B. Brady, Parker, and Jones, Trans. 

 Zool. Soc, vol. 12, 1888, p. 224, pi. 44, fig. 12. — Burrows, Sherborn, and 

 Bailey, Journ. Roy. Micr. Soc, 1890, p. 560, pi. 10, fig. 22.— Egger, Abh. 

 kon. bay. Akad. Wiss., Miincben, CI. n, vol. 18, 1893, p. 353, pi. 12, figs. 

 16-18.— Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 1894, p. 62, pi. 10, 

 figs. 593-595.— Flint, Rep. U. S. Nat. Mus., p. 316, pi. 63, fig. 1.— Millett, 

 Journ. Roy. Micr. Soc, 1903, p. 256, pi. 5, fig. 1. 



Description. — Test compressed, varying in form according to stage 

 in development, early stages nearly circular, later becoming elliptical 

 or oblong; chambers comparatively few, high and broad; surface 

 smooth, sutures very slightly depressed, in adult specimens the 

 periphery keeled; aperture in adults somewhat produced, the outer 

 border irregularly dentate- 

 Length usually not much exceeding 1 mm. 



Distribution. — Brady records this species from a single Challenger 

 station, 232, on the Hijalonema-gTOWid, south of Japan in 345 fath- 

 oms. I have had it from but four stations, Albatross stations off 

 Japan, D4897, 207 fathoms, bottom temperature 49.7° F.; D4949, 

 110 fathoms, bottom temperature 57.8° F.; D4970 in 500 fathoms, 

 bottom temperature 39.1° F.; and D5056 in Suruga Gulf, Japan, 

 258 fathoms, bottom temperature 46.0° F. 



This species is distinct from most others of the genus in its few 

 high, broad chambers, taking but a very few to make a complete 

 convolution and in the peculiar form of the aperture with its almost 

 ragged appearance at the periphery. 



CRISTELLARIA CREPIDULA (Fichtel and Moll). 

 Plate 29, figs. 5, 6; plate 31, figs. 2-5. 



Nautilus a-epidula Fichtel and Moll, Test. Micr., 1803, p. 107, pi. 19, figs. g-i. 



Cristellaria crepidula d'Orbigny, in Be la Sagra, Hist. Fis. Pol. Nat. Cuba, 1839, 

 "Foramini feres," p. 64, pi. 8, figs. 17, 18.— Parker and Jones, Philos. 

 Trans., vol. 155, 1865, p. 344, pi. 13, figs. 15, 16; pi. 16, fig. 4.— H. B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 542, pi. 67, figs. 17, 19, 20; 

 pi. 68, figs. 1, 2. — Fornasini, Mem. Accad. Sci. 1st. Bologna, ser. 4, vol. 10, 

 1890, p. 471, pi. 2, figs. 31-33, 56-60.— Egger, Abh. kon. bay. Akad. Wiss. 

 Munchen, CI. n, vol. 18, 1893, p. 350, pi. 11, figs. 51, 52; pi. 12, figs. 34, 

 35.— Goes, Kongl. Svensk. Vet. Akad. Handl., vol. 25, 1894, p. 62, pi. 11, 

 figs. 599, 600; Bull. Mus. Comp. Zool., vol. 29, 1896, p. 57.— Flint, Rep. 

 U. S. Nat. Mus., 1897 (1899), p. 316, pi. 63, fig. 2.— Millett, Journ. Roy. 

 Micr. Soc, 1903, p. 254. — Sidebottom, Mem. and Proc Manchester Lit. 

 and Philos. Soc, vol. 51, No. 9, 1907, p. 7, pi. 2, fig. 1— Bagg, Proc. U. S. 

 Nat. Mus., vol. 34, 1908, p. 146. 



