200 THE FOEAMINIPERA 



and straight. Anterior end acuminate ; posterior 

 obtuse and rounded. Early alternating chambers 

 vary in number ; later, uniserial chambers two to six 

 in number, more or less inflated. Surface smooth. 

 The fossil specimens of the above form were found 

 in the Tertiary beds of Italy, Spain, of the Vienna 

 Basin, and East Anglia. It is also noted from the 

 Mediterranean at depths not exceeding 100 fathoms. 

 (Plate 11, fig. B.) 



Genus Uvigerina, D'Orbigny. 



Segments arranged in a more or less regular spire 

 round the long axis of the shell, rarely biserial. 

 Aperture single, usually surrounded by a phialine 

 lip : often forming a prolonged terminal tube. 



In this genus the surface of the test is frequently 

 ornamented either with striae, costcP, prickles, or 

 spines. Eocene to lleceut. 



Example. — U. 2:)ycjmcea, D'Orbigny, ' Ann. Sci. 

 Nat.' vol. vii. 1826, p. 269, pi. xii. figs. 8, 9 ; Modele, 

 No. 67. 



This species is one of the strong-ribbed modifi- 

 cations, with a broadly ovate test. As a fossil it is 

 common in all the later Tertiary (Neogene) deposits. 

 In modern seas it is a well-distributed species, aiid 

 ranges from shallow water to 2,600 fathoms. Goes's 

 specimens came from the west coast of Scandinavia 

 at depths of 11 to 49 fathoms. Miocene to Becent. 

 (Plate 11, fig. C.) 



