LAGENIDAE — NODOSARIA; CRISTELLARIA; POLYMORPHINA. 33 



Genus POLYMORPHINA d'Orbigny, 1826. 

 Polymorphina regina H. B. Brady, Parker, and Jones. 



(Plate 4, Figures 5, 6.) 



Polymorphina regina H. B. Brady, Parker, and Jones, Trans. Linn. Soc. London, vol. 27, 

 1870, p. 241, pi. 41, figs. 32 a, b. — H. B. Brady, Rep. Voy. Challenger, Zoology, 

 vol. 9, 1884, p. 571, pi. 73, figs. 11 to 13.— Egger, Abh. kon. bay. Akad. Wisa. 

 Miinchen, CI. II, vol. 18, 1893, p. 310, pi. 9, figs. 45, 50, 51.— Millett, Journ. Roy. 

 Micr. Soc, 1903, p. 265. — Chapman, Journ. Quekett Micr. Club, 1907, p. 132, 

 pi. 10, fig. 4.— Bagg, Proc. U. S. Nat. Mus., vol. 34, 1908, p. 139.— Chapman, 

 Proc. Roy. Soc. Victoria, vol. 22, 1910. p. 281.— Cuehman, Bull. 71, U. S. Nat. 

 Mus., pt. 3, 1913, p. 91, pi. 41, figs. 6, 7. — Heron-Allen and Earland, Trans. Linn. 

 Soc. Zool., vol. 20, 1915, p. 673. — Cushman, Proc. U. S. Nat. Mus., vol. 56, 1919, 

 p. 619. 



Test fusiform; chambers several, inflated, with deep sutures; wall orna- 

 mented with elongate, coarse costse, usually not broken on the individual 

 chambers; aperture radiate, produced. 



Length of the Tortugas specimens not exceeding 0.75 mm. 



Almost all the records for this species seem to be from the Indo- 

 Pacific region, but there is a considerable development of specimens 

 in the region of the Tortugas which may be referred to this species. 

 It has been recorded in the fossil state from the Miocene and Oligo- 

 cene in the Coastal Plain of the United States. It is evidently one 

 of those species, related to the present fauna of the Indo-Pacific, 

 which has existed in this region of the Gulf of Mexico since Oligo- 

 cene time with little change. 



Polymorphina pulchella (d'Orbigny). 



(Plate 4, Figures 7, 8.) 



Outtulina pulchella d'Orbigny, in De la Sagra, Hist Fis. Pol. Nat. Cuba, 1839, "Forami- 



nifSres," p. 129, pi. 2, figs. 4 to 6. 

 Polymorphina pulchella H. B. Brady, Parker, and Jones, Trans. Linn. Soc. London, vol. 27, 



1870, p. 239, pi. 41, figs. 28 a, b. 



Test elongate, fusiform,, somewhat compressed, both ends acute; chambers 

 few; sutures distinct, slightly depressed; wall translucent, with numerous 

 longitudinal costse; aperture slightly extended, radiate. 



Length of the Tortugas specimens up to 0.75 mm. 



This is one of the species described by d'Orbigny from the shore 

 sands of Cuba and Martinique, and except for the reference given 

 by Brady, Parker, and Jones, who copied d'Orbigny 's figure, little 

 has been known about the species. Very excellent specimens, which 

 agree well with d'Orbigny's original figures, as a comparison will 

 show (plate 4, figs. 7 and 8), were found at several of the stations in 

 the Tortugas region. It is a beautiful species with its clear shell 

 wall and very delicate longitudinal costae, and can hardly be taken 

 for any other when once seen. 



