40 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



(713 meters). Pearcey records this from the warm area of Faroe 

 Channel as rare,^'"' Flint gives a single station Albatross D2530, in 

 956 fathoms (1749 meters), southeast of Georges Bank. There are 

 two other Challenger stations in the Atlantic, one off the Bermudas, 

 the other off the Azores. The six stations from which I have had 

 specimens are scattered, one southeast of Cape Hatteras, one off 

 Ragged Key, Florida, three in various parts of the Caribbean, and 

 one off the coast of Brazil. The Atlantic specimens are very long, 

 slender, and are very finely punctate, differing from the somewhat 

 broader, very coarsely punctate form of the Pacific. 



Bolivina porrecta — material examined. 



BOUVINA MAYORI Cushman. 



Bolivina mayori Cushman, Publ. 311, Carnegie Inst. Wash., 1922, p. 27, pi. 3, 

 figs. 5, 6. 



Description. — Test elongate, somewhat compressed, of nearly uni- 

 form width, except in the extreme young; chambers numerous, dis- 

 tinct; sutures depressed; wall thin, translucent, coarsely punctate, 

 especially in the young; chambers in the later portion extending 

 clear across the test, the last-formed chamber in the adults forming 

 the entire width of the test and usually of a less diameter than the 

 preceding; the wall smooth, except in the early portion, which has 

 a few longitudinal costae; aperture in the adult terminal, elongate, 

 extending nearly across the peripheral end of the last-formed cham- 

 ber with a slightly projecting lip. 



Length up to 0.85 mm. 



This species most nearly. resembles B. porrecta H. B. Brady, but 

 differs in the more attenuate form and the ornamentation of the 

 early portion. The punctations over a large part of the surface are 

 arranged in longitudinal lines. In old-age specimens the diameter of 

 the test is considerably less in the last-formed chamber than at the 

 maximum width of the preceding chambers. The aperture would 

 place this species in the subgenus Bifarina. It has occured at^ 

 numerous stations in the Tortugas region, but not in any consider- 

 able numbers. 



M Trans. Nat. Hist. See. Glasgow, vol. 2, 1890, p. 177. 



