4G 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



region. Sidebottom originally described this as a variety of Boliv- 

 ina rohusta from the Mediterranean, and I have referred to it speci- 

 mens from the tropical Pacific. 



BOLIVINA ROBUSTA H. B. Brady, TarJcty. • 



Plate 6, fig. 6. 



There are specimens from two Albatross stations, D2150, in the 

 western Caribbean, and D2420, off the southeast coast of the United 

 States. These may be referred to this species. They are somewhat 

 like the figures given by Brady (pi. 53, fig. 7), but lack the spine 

 typical of this species. There are Challenger records for this species 

 from off the West Indies in 450 fathoms (823 meters), off Bermuda, 

 950 fathoms (1,740 meters), off the Canaries, 1,125 fathoms (2,057 

 meters), and off the coast of Brazil, 675 fathoms (1,234 meters). 



Bolivina rohusta, var. — material examined. 



BOLIVINA SUBAENARIENSIS, new species. 



Plate 7, fig. 6. 



Bolivina aenariensis H. B. Brady (not Costa), Proc. Roy. Soc. Edinburgh, vol. 

 11, 1882, p. 711; Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 423, pi. 53, 

 figs. 10, 11; Journ. Roy. Micr. Soc, 1887, p. 900.— H. B. Brady, Parker, 

 and Jones, Trans. Zool. Soc. London, vol. 12, 1888, p. 221, pi. 43, figs. 2, 

 4, 5.— Pearcey, Trans. Nat. Hist. Soc. Glasgow, vol. 2, 1890, p. 177.— 

 Wright, Proc. Roy. Irish Acad., ser. 3, vol. 1, 1891, p. 475.— Flint, Rep. 

 U. S. Nat. Mus., 1897 (1899), p. 292, pi. 37, fig. 8. 



Description. — Test elongate, much compressed, slightly tapering, 

 periphery acute, often carinate, surface smooth except for two long 

 raised costae running from the apex toward the apertural end of 

 the test, and one or two supplementary ones, much shorter, the 

 apical end with a single short spine; chambers distinct, curved, 

 widest near the center; sutures distinct, slightly depressed, wall 

 finely punctate; aperture semicircular; color white. 



Length up to, or slightly exceeding, 1 mm. 



Distribution. — Type-specimen (U.S.N.M. No. 17113) from Alba- 

 tross station D2262, in 250 fathoms (457 meters), southeast of 

 Nantucket. It is a common species at many stations from south of 

 Nova Scotia to Cape Hatteras. It is apparently found off the 

 British Isles in cold water and is excellently figured by Brady, 

 Parker, and Jones from the Abrohlos Bank, Brazil, in 40 and 260 

 fathoms (73 and 476 meters). Specimens referred to B. aenariensis 



