158 



BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



translucent, with numerous longitudinal costae; aperture slightly 

 extended, radiate. 



Length up to 0.75 mm. 



DistHhution. — D'Orbigny originally described and figured this 

 species from the West Indies region recording it from the shore 

 sands of Cuba and Martinique. The only other records for it are very 

 typical specimens which- 1 obtained at numerous stations in the Tortu- 

 gas region of the Gulf of Mexico. 



It is a very beautiful species, with a clear shell wall ornamented 

 with very delicate longitudinal costae, and apparently has a fairly 

 wide distribution in the West Indian region. 



Polymorphina pulchella — material examined. 



POLYMORPHINA HIRSUTA H. B. Brady. Parker, and Jones. 



Polymorphina hirsuta H. B. Bk.\dy, Parker, and Jones, Trans. Linn. Soc. 

 London, vol. 27, 1870, p. 243, pi. 42, fig. 37. — Heron-Allen and Earland, 

 Journ. Roy. Micr. Soc, 1909, p. 435, pi. 17, fig. 1. 



Brady, Parker, and Jones record this species from a single speci- 

 men from the West Indies. Other records for it seem to be as a 

 fossil. 



POLYMORPHINA MYRISTIFORMIS WilliamBon. 



Plate 41, figs. 9-12. 



Polymorphina myrisUformis Williamson, Rec. Foram. Great Britain, 1858, 

 p. 73, pi. 6, figs. 156, 157.— H. B. Brady, Trans. Linn. Soc, vol. 24, 

 1864, p. 473.— Alcock, Proc Lit. Philos. Soc Manchester, vol. 4, 1865, 

 p. 206. — H. B. Brady, Parkehj, and Jones, Trans. Linn. Soc London, 

 vol. 27, 1870, p. 240, pi. 41, figs. 30 a-c— Fischer, Actes Soc. Linn. 

 Bordeaux, vol. 27, 1870, p. 391, No. 26.— H. B. Brady, Rep. Voy. 

 Challenger, Zoology, vol. 9, 1884, p. 571, pi. 73, figs. 9, 10.— Balkwill 

 and Wright, Trans. Roy. Irish Acad., vol. 28, 1885, p. 346.— H. B. 

 Brady, Journ. Roy. Micr. Soc, 1887, p. 914. — Wright, Proc Roy. 

 Irish Acad., ser. 3, vol. 1, 1891, p. 487. — Robertson, Trans. Nat. Hist. 

 Soc Glasgow, vol. 3, pt. 3, 1892, p. 241.— Wright, Irish Nat., vol. 9, 

 1900, p. 55. — Heron-Allen and Earland, Journ. Roy. Micr. Soc, 1907, 

 p. 434. — SiDEBOTTOM, Mem. Proc. Manchester Lit. Philos. Soc, vol. 51, 

 No. 9, 1907, p. 13, pi. 3, fig. 7. — Balkwill and Millett, Rec. Foram. 

 Galway, 1908, p. 6, pi. 4, fig. 10. — Heron-Allen and Earland, Proc. 

 Roy. Irish Acad., vol. 31, pt. 64, 1913, p. 103, pi. 8, figs. IS, 19 ; Trans. 

 Linn. Soc London, ser. 2, vol. 11, 1916, p. 265; Journ. Roy. Micr. Soc, 

 1916, p. 48. 



