28 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



BIGENERINA CAPREOLUS (d'OrWgny). 



Plate 5, fig. 10. 



Vulvulina capreolus d'Orbigny, Ann. Sci. Nat., vol. 7, 1826, p. 264, No. 1, pi. 



11, figs. 5, 6; Modules, 1826, No. 59. 

 Grammostomum capreolus Parker and Jones, Ann. Mag. Nat. Hist., ser. 3, 



vol. 11, 1863, p. 93. 

 Bigenerina capreolus H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 1884, 



p. 372, pi. 45, figs. 1-4.— Goes, Bull. Mus. Comp. Zool., vol. 29, 1896, p. 



44.— Flint, Rep. U. S. Nat. Mus., 1897 (1899), p. 286, pi. 32, fig. 3.— Cush- 



MAN, Bull. 100, U. S. Nat. Mus., vol. 4, 1921, p. 127, pi. 26, figs, la, b. 



Description. — Test compressed, slightly longer than wide, the 

 biserial portion occupying the larger part of the test, uniserial stage 

 represented by only one or two chambers, somewhat less in width 

 than the preceding part of the test, periphery acute, more or less 

 pectinate; chambers distinct, especially those in the later portion; 

 sutures limbate, raised, confluent along the middle line of the test, 

 in the later portion depressed, wall arenaceous, in the early portion 

 more or less roughened and the last uniserial chambers smoothly 

 finished; aperture of the biserial part Textularian, the later portion 

 terminal, central, much elongated, narrow; color gray. 



Length up to 2.5 mm. 



Distribution. — The type-specimens of this species are recorded by 

 d'Orbigny from the Adriatic Sea. There are numerous records for 

 this species in the Atlantic, several being given by Brady off the 

 Azores, 450 fathoms (823 meters); off the Canaries, 600 fathoms 

 (1,097 meters); off the Danish West Indies, 390 and 450 fathoms 

 (713 and 823 meters), and off the coast of Brazil, near Pernambuco, 

 350 and 675 fathoms (640 and 1,234 meters). Brady also records it 

 from some of the Porcupine dredgings as far north as 50° N. latitude. 

 Goes records it as very rare in 399 fathoms (730 meters), in the 

 Caribbean, at Albatross station D2355. Flint's specimens were 

 from Albatross station D2416, off the coast of Georgia, in 276 fathoms 

 (505 meters). I have had specimens from this station, also from 

 station D2415 in the same region, 440 fathoms (805 meters), and at 

 D2355, the station from which Goes records this species. 



Bigenerina capreolus — material examined. 



