315 ■ Tertiary Foraminifera 21 



ten respedlively on each side; aperture a median arched open- 

 ing; length 0.53 mm., breadth 0.20 mm. 



The occurrence of SplropleBa has never been reported from 

 the Tertiary formation, save in the present instance, so far as 

 I am able to learn. It has, hovi^ever, been described from the 

 Cretaceous of Mississippi and from the Gault and Chalk of Eng- 

 land (Parker & Jones), and is sparingly found in present oceans 

 (Brady). It has also been reported from the Post-tertiary beds 

 of the northeast of Ireland (Wright). 



The above specimens which have been identified as belonging 

 to the genus SpiropleBa seem to be new. They more nearly re- 

 semble SpiropleHa bifor^m's Vdixli&x &.]or\es, but differ from that 

 species in the possession of sharp angular edges. The distal 

 end is more obtusely rounded than in Textularian types and 

 the chambers are less regularly developed. Only two specimens 

 have thus far been discovered. 



Horizo7i and locality. — Eocene; Woodstock, Va. 



Geological distribution . — Eocene. 



Genus BULIMINA d'Orbigny. 



Bulimina aculeata. 



Syn. Bulimina aculeata d'Orbigny, Ann. Sci. Nat., vol. vii, p. 269. No. 

 7, 1826. 

 Bulimina aculeata Brady, Chal. Rep't, vol. ix, p. 406, pi. li, figs. 7-9, 

 1884. 

 Test composed of numerous irregular sized chambers arrang- 

 ed in a short triserial spire; anterior end obtusely rounded and 

 free from surface ornamentation, posterior ending rather bluntly 

 and furnished with spines, the lower chambers also have spines 

 and irregular ridges more or less developed; length .60 mm. 



This is not a common form in the Virginia Miocene. Its 

 peculiar surface ornamentation makes it easy to identif5^ 

 Horizon and locality . — Miocene; James river, Va. 

 Geological distribtitio7i. — Miocene. 

 Bulimina buchiana. 

 Syn. Bulimiiia buchiana d'Orbigny, Foram. Foss. Vien. p. 186, pi. xi, 

 figs. 15-18, 1846. 

 , Bulimina buchiana Brady, Chal. Rep't, vol. ix, p. 407, pi. li, figs. 



18, 19, 1884. 

 Test short and stout, triserial, tapering; posterior end acutely 

 rounded, anterior obtuse; segments distinA, slightly inflated; 

 surface of shell marked by definite longitudinal costse, which 



