﻿4 SlDEBOTTOM, Nevillina,a New Genus of Foraminifera. 



EXPLANATION OF PLATE. 



The figures are magnified 25 diameters. 



Nevillina coronata Millett, sp. 



Fig. 1. This specimen, when found, was broken, and in 

 preparing for section became further fractured, the exposed 

 internal test, however, was not damaged, Fig. 2 being a drawing. 

 of it, and the section Fig. 8, was made from it. 



Fig. 3a, b. Side and end views of a smaller example. 



Fig. 4. Immature test in the triloculine condition. 



Figs. 5, 6. Immature tests in the biloculine condition. 



Fig. 7. Fragment of what must have been a very large 

 specimen. 



Fig. 8. Section of the test (Fig. 2) showing arrangement 

 of its chambers in the various stages of its growth. 



