20 SiDEBOTTOM, Fovaminifera from the Island of Delos. 



The test is semi-translucent and slightly compressed, 

 and has a cribrate aperture which seems to be formed of 

 very minute sand grains. I have been much puzzled 

 concerning this form and by the different opinions 

 expressed as to its identity, and feel I cannot do better 

 than accept M. Schlumberger's decision that it is a 

 Haiierina of megalospheric form A, and is most probably 

 H. compressa, d'Orbigny. Frequent. 



Planispirina, Seguenza. 



Planispirina schlumbergeri, n. sp. (PI. 5, figs. 9-1 1 ; 

 Section 10). 



No. 10. Planispirina schlumbergeri, n. sp. x 50. 

 Horizontal section of the test. 



Test compressed, chambers embracing, the last three 



