327 Tertiary Foraminifera ' 33 



Test much more finely striate than Uvigerina pygmcBa and 

 more slender, tapering to a small well rounded end below and 

 gradually increasing in size above. The chambers are not so 

 globose and the septa are not so depressed as in Uvigerina 

 pygmrea. Aperture at the end of a flaring tubular neck as in 

 typical Uvige7'i)ia forms. 



The above species is less common than the allied form Uvi- 

 gerina pygnicBa. 



Horizon and locality. — Miocene; Norfolk, Va. Well boring, 

 depth 645 to 685 feet. It also occurs in the artesian well bor- 

 ing, Crisfield, Md. 



Geological distribution. — Upper Oligocene to Recent. 



Genus GLOBIGERINA d'Orbigny. 

 Globigerina bulloides. 



Syn. Globigerina bulloides dL^Orhx^ny, h.xv!\.^c\.^a.\.., vol. vii, p. 277, 

 No. I, 1826. Modele's No. 17, (young) and No. 76. 

 Globigerina bulloides d'Orbigny, Foram. Foss. Vien., p. 163, pi. ix, 



figs. 4-6, 1846. 

 Globigerina bulloides Brady, Chal. Rep't, vol. ix, p. 593, pi. Ixxvii, 

 and pl. Ixxix, figs. 3-7, 1884. 

 "Test Spiral, subtrochoid; superior surface convex, inferior 

 more or less convex but with deeply sunken umbilicus, peri- 

 phery rounded, lobulated; adult specimens composed of about 

 seven globose segments, of which four form the outer con- 

 volution, the aperture of the individual chambers opening in- 

 dependently into the umbilical vestibule; diameter sometimes one 

 fortieth of an inch (0.63 mm.), but oftener much less." (Brady, 

 loc. cit. ) 



Globigerina bulloides is not an unusual form in the Miocene of 

 Virginia but it is more abundant at Plum Point, Maryland than 

 elsewhere. 



Horizon and locality. — Eocene; Woodstock, Va. Miocene; Dar- 

 lington, S. C, James river and Yorktown, Va., Plum Point, 

 Maryland. 



Geological distribution. — Cretaceous to Recent. 



Genus SPIRHLINA Ehrenberg. 



Spirillina orbicularis, n. sp. 



Test free, consisting of a non-septate tube coiled in a piano- 



