i8| SiDEBOTTOM, Foraminifera from the Island of Delos. 



Vertebralina, d'Orbigny. 

 *Vertebralina striata, d'Orbigny. 



Vertebralina striata (d'Orb.), Brady ('84), p. 187, pi. 12, 

 figs. 14-16. 



This species is present in great numbers and in all 

 stages of growth. Many are of large size, and some of 

 them boldly striated and pitted as in V. insignis. Common. 



Massilina, Schlumberger. 

 *Massilina secans, d'Orbigny, sp. 



Massilina secans (d'Orb.), Schlumberger ('93), p. 218, 

 figs. 31-34, pi. 4, figs. 82, 83. M. secans (d'Orb.), Goes ('94), 

 p. 112, pi. 20, fig. 856. 



This occurs in two forms, the one which is frequent 

 has the periphery plain, and the other, which is rare, has 

 it beautifully denticulated ; this latter form is well figured 

 by M. Schlumberger. 



Massilina annectens, d'Orbigny, sp. (PI. 5, figs. 2-4). 



Massilina annectens^ Schlumberger ('93), p. 220, pl. 3, 

 figs. 77-79. 



The tests are nearly as wide as they are long, deeply 

 excavated on one side, and with the chamber on the side 

 opposite to this excavation very protuberant and angular. 

 Frequent. 



Massilina rugosa, n. sp. (PI. 5, figs. 5,6; Section 7.). 



The test of this form is rough and compressed, and 

 the two final chambers embracing. The amount of 

 exposure of the third chamber varies slightly, and in one 

 or two cases a fourth one shows. The mouth is very 

 large and heavily bordered, and the tooth strong and 



