108 BULLETIN 104, UNITED STATES NATIONAL MUSEUM. 



BULIMINA MINIJTISSIMA J. Wright. 



Plate 17, figs. 5, 6. 



BuliminaminutissimaJ. Wright, Proc. Liverpool Geol. Soc, vol. 9, 1892, p. 190, 

 pi. 13, figs. 9-12.— Heron-Allen and Earland, Proc. Roy. Irish Acad., vol. 

 31, pt. 64, 1913, p. 62, pi. 4, figs. 11, 12; Journ. Roy. Micr. Soc, 1916, p. 43; 

 Trans. Linn. Soc. Zool., ser. 2, vol. 11, 1916, p. 237. 



This small species described by Wright from Boulder clays of 

 England has been recorded by Heron- Allen and Earland from the 

 Clare Island region, off South Cornwall, and west of Scotland. I 

 have seen no material on the American side. 



Genus BULIMINELLA Cushman, 1911. 



Bulbnina (part) u'Orbigny, Foram. Amer. Merid., 1839, p. 51. — II.B. Brady, 

 Rep. Voy. Challenger, Zoology, vol. 9, 1884, p. 397. — Chapman, The Fora- 

 minifera, 1902, p. 172. 



Bulinmiella Cushman (type, Buliminella elcgantissima (d'Orbigny)), Bull. 71 

 U. S. Nat. Mu3., pt. 2, 1911, p. 88. 



Description. — Test composed of chambers triserially arranged, 

 but in later development becoming involute and spirally coiled, the 

 aperture being in the umbilicus thus formed; wall calcareous, per- 

 forate; aperture in the species but little twisted spirally, long and 

 narrow, nearly vertical, in the closely spiral species becoming rounded 

 in the middle of the concave umbilical area. 



This genus was erected to include those species in which the spiral 

 form of the test is very marked, all modifications of it with the 

 peculiar aperture situated in the umbilical area, as in B. sithteres 

 (H. B. Brady), B. declivis (Reuss), and 5. contraria (Reuss). 



BULIMINELLA ELEGANTISSIMA (d'Orbiuny), var. SEMINLDA (Terquem). 



Plate 23, fig. 5. 



Bulimina seminuda Terquem, M6m. Soc.g^ol. France, ser. 3, vol. 2, M^m. Ill, 



1882, p. 117, pi. 12, fig. 2L 

 Bulimina eleganhssima d'Orbigny, var. seminuda H. B. Brady, Rep. Voy. 



Challenger, Zoology, vol. 9, 1884, p. 403, pi. 50, figs. 23, 24.— Dakin, Rep. 



Ceylon Pearl-Oyster Fisheries, vol. 5, 1906, p. 234. — Heron-Allen and 



Earland, Journ. Roy. Micr. Soc, 1908, p. 312. — Chapman, Biol. Res. 



Endeavour, vol. 3. pt. 1, 1915, p. 18. 



Description. — ''This variety presents similar general features to 

 Bulimina elegantissima, and exhibits the same regularly spiral mode 

 of growth; but it differs from the typical form in its stouter build 

 and in the greater obliquity of the segments. The shell-wall is 

 usually thick, and the exterior is often partially striate or costate 

 near the initial end." 



Distribution. — Terquem described a species from the Eocene of 

 the Paris Basin which Brady has placed as a variety, as noted above. 

 Heron-Allen and Earland note it from the Eocene shore sands of 



