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BULLETIN 104, UNITED STATES NATIONAL MUSEUM 



Outside of d'Orbigiiy's records I have given only those references 

 that pertain to the western Atlantic. The records for this species 

 cover most of the oceans, and further study may show these to 

 belong to different species. It is well distributed in the western 

 Atlantic from the coast of Florida through the West Indies to Brazil. 

 There are very many records for it on the eastern side of the Atlantic 

 from the coasts of Norway to Spain and West Africa and the Medi- 

 terranean, as well as the Indo-Pacific. The early chambers have 

 a distinct spiral tendency. The later development is irregular, but 

 the periphery is usually well rounded and typically entire. 



Flint's specimens referred to Gypsina inhaerens probably belong 

 here. 



Planorbulina mediierranensis — Material examined 



PLANOKBUUNA ACERVAUS H. B. Brady 



Plate 25, figures 1 a, b 



Planorbulina acervalis H. B. Brady, Rep. Voy. Challenger, Zoology, vol. 9, 

 1884, p. 657, pi. 92, fig. 4.— H. B. Brady, Parker, and Jones, Trans. 

 Zool. Soc, London, vol. 12, 1888, p. 227, pi. 46, fig. 11. — Chapman, 

 Proc. Zool. Soc, London, 1895, p. 39.— Flint, Rep't. U. S. Nat. Mus., 

 1897(1899), p. 328, pi. 72, fig. 7.— Chapman, Journ. Linn. Soc. Zool., 

 vol. 28, 1902, p. 382.— MiLLETT, Journ. Roy. Micr. Soc, 1904, p. 490.— 

 Rhumbler, Zool. Jahrb., Abteil. Syst., vol. 24, 1906, p. 67. — Side- 

 bottom, Mem. Proc. Manchester Lit. Philos. Soc, vol. 53, No. 21, 1909, 



