THE FORAMINIFERA 



129 



Kio. JO. 



HeterostegiiM depressa, d'Orb. A and B the uiegalospheric and microspheric forms, x 8. 

 A', B', central regions of sections of these tests in the median plane, x 50. The figures 14 and 

 38 mark the first of the subdivided chambers, in the two forms respectively. The canal system 

 is barely indicated in this figure and in figure 55. 



