FAMILY 13. LOFTUSIIDAE 139 



especially in Asia, there have been found very many species of 

 the genera and subgenera of the Fusulininae with the exception 

 of Depratella, which is found only in the Permian. 



With the Permian a great change in the Fusulinidae occurred. 

 All the Carboniferous genera have come to a decline and are re- 

 placed by a new group — Verbeekininae, derived directly from 

 Endothyra. The Verbeekininae having complex structure are 

 envolved rapidly in the Permian, therefore they are very useful 

 for precise age determinations (see Ozawa's paper, Journ. Fac. 

 Sci. Imp. Univ. Tokyo, ser. 2, vol. 2, pt. 3, 1927). They have 

 been found only in Southern Europe and Asia. 



FAMILY 13. LOFTUSIIDAE 



Test large, fusiform or elliptical, close coiled about an elongate 

 axis ; wall arenaceous, interior labyrinthic. 



Genus LOFTUSIA H. B. Brady, 1869 



Plate 16, figure 1 

 Genoholotype, Loftusia persica H. B. Brady 



Loftusia H. B. Brady, in Carpenter and H. B. Brady, Phil. Trans., 1869, 

 p. 721. 



Test fusiform, coiled about the elongate axis ; chambers of the 

 early portion more rounded, later with the axis greatly increas- 

 ing in length, interior labyrinthic; wall arenaceous; apertures 

 near the base along the apertural face of the chamber. 



Eocene. 



This is one of the largest of the foraminifera. Beautifully 

 sectioned specimens studied at the British Museum show that 

 the early stages are much more compressed along the line of the 

 axis and indicate that this family is the outgrowth of such a 

 form as Cydanimina by the elongation of the axis similar to the 

 development of the Fusulinidae from such forms as Endothyra. 

 It has been the usual custom to bring Parkeria in close relation- 

 ship with Loftusia. Excellent sections of Parkeria in the British 

 Museum and at Cambridge seem to show that the structure is 

 very different. 



