354 BULLETIN : MUSEUM OF COMPARATIVE ZOOLOGY. 



Kambara. The main mass of the island is composed of volcanic 

 rocks. It is surrounded by a flat. There were at least two periods of 

 upheaval. 



250 ft. A fragmentary and fairly fresh rock. It contains Litho- 

 thamnion, numerous spines and fragments of the tests of echinoderms 

 and a few fragments of Polyzoa. 



Fig. 2. Kambara, 250 ft. Lithothamnion (basal view), a fragment, X 85. 



Foraminifera : Polytrema, a large mass growing on Lithothamnion, 

 besides fragments. 

 Carpentebia, abundant and very well preserved. 



C» *^*?>» v - 



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Fig. 3. Kambara, 250 ft. Fragment of Carpenteria, X 85. The organism is 

 of a pale straw yellow color. 



Amphistegina lessonii d'Orb. 



Gypsina vesicularis var. monticulus Chapman. 



Heterostegina depressa d'Orb, young specimens. 



Orbitolites, small fragments. 



Rotalian form. 



