﻿Manchester Memoirs, Vol. xlix. (1905), No. 1 



XI. On Nevillina, a New Genus of Foraminifera. 

 By Henry Sidebottom. 



Received and read March 2fsf, IQOJ. 



MILIOLID^E. 



Miliolinix.i;. 

 Nevillina, gen. nov. 



Test free, elongate, more or less pyriform, circular in. 

 transverse section, the final chamber completely embracing 

 the previous one. Aperture circular, complex, formed by 

 numerous incurved lamellae, meeting centrally. 



Nevillina coronata Millett, sp. 



Biloadina coronata, Millett, Journ. R. Alter. Soe., 1898, 

 p. 263, pi. 6, figs. 6, a, b, c. 



Test elongate, more or less pyriform, circular in 

 transverse section. Aperture circular, complex, formed 

 by numerous incurved lamellae, meeting centrally. 



The test in the early stages of growth is slightly 

 compressed, and is either triloculine or biloculine, after- 

 wards each succeeding chamber entirely embraces the 

 preceding one. These last chambers are attached to each 

 other at one end of the shell, and their direction of growth 

 alternates, that is to say, they are put on first at one end 

 and then at the other. The shell-wall is thin, smooth, 

 white and polished, and when mounted in Canada balsam 

 and viewed by transmitted light, shows the usual light- 

 brown colour. 



April 2/t/i, lgoj. 



