360 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Foramiuifera : ] Planorbulina or 1 Gypsina. 



AMPHISTEGINA LESSONII d'Orb. 



Yavau. — Vavau is elliptical in outline, highest in the northern por- 

 tion, where it reaches 500 ft. The southern shore is deeply indented 

 and denudation has separated off numerous small islands from the main- 

 laud. Four terraces are visible. 



1st terrace. Organisms somewhat indistinct. They consist of Polyzoa, 

 echinoderms, and the following 



Foramiuifera : Miliolina ferussacii d'Orb, sp. 



Carpenteria, somewhat indistinct. 



Globigerina. 



1 Gaudryina, a textularian form, probably belongs to 



this genus. 

 Gypsina. 



Polytrema miniaceum Pallas, sp. 

 % Gypsina globulus Reuss, one indistinct specimen. 

 2d terrace, 1 310 ft. Lithothamnion, Polyzoa, Gasteropoda. 

 Foramiuifera : Textularia. 



Gypsina, numerous specimens. 

 Carpenteria. 



Polytrema miniaceum Pallas, sp. 

 Miliolina. 

 2d terrace, ? 350 ft. Polyzoa, echinoderm spines, Lithothamnion. 

 Foramiuifera : Miliolina, several specimens. 

 Carpenteria. 

 1 Globigerina conglobata Brady (or possibly Sphce- 



roidina bulloides), one specimen only. 

 Amphistegina lessonii d'Orb, one specimen. 

 2d terrace, 360 ft. Numerous fragmentary organisms embedded in a 

 crystalline matrix. Lithothamnion is the most abundant organism. 

 Echinoderms, Gasteropoda, and annelids (?) are also present. 

 Foraminifera : Polytrema miniaceum Pallas, sp. 

 Carpenteria. 



Amphistegina lessoni d'Orb. 

 Globigerina, one specimen enclosed in an annelid (?) 



tube. 

 Gypsina. 

 3d terrace. Highest point, north shore. The only organisms are 

 alcyonarian spicules, and of these the rock is mainly composed. 



