16 ART. 6. — R. B. NEWTON AND R. HOLLAND : 



Borneo, we found numerous undoubted specimens of the genus 

 (Ann. Mag. Nat. Hist., 1899, Sér. VII, Vol. Ill, p. 262, PI. X, 

 fig. 6). The most careful search through our slides cut from 

 the Orbitoidal limestone of Iriomoté Island, however, yields no 

 specimen which will throw further light on the organism here 

 represented and we can only assign it provisionally to the genus 

 Linder in a. 



Occurrence : Iriomoté limestone, Riü-Kiü Island. 



Amphistegina vulgaris Okbignt. (PI. II, fig. 1.) 



Amphistegina vulgaris, d'OKBiGNY : 1823, Modèles, Liv. 2° 

 No. 40, Ann. Soc. Nat., 1826. Vol. VII, p. 305, No. 8. 



Amphistegina lessonii, d'ORBiGNY : 1823, Modèles, Liv. 4, 

 No. 98, Ann. Sei. Nat., 1826. Vol. VII, p. 304, No. 3. 



Amphistegina lessonii, Beady : 1884, Chall. Report, pp. 710, 

 741, PI. CXI, figs. 1-7. 



Associated with the Orbiloides, Carpenteria and Lithotham- 

 nium which make up the great mass of the Iriomoté Island 

 limestone, are a few other Foraminifera among which Amphistegina 

 vulgaris is the most conspicuous. The specimens are small in 

 common with most of the other organisms in the limestone, but 

 they are fairly numerous. 



Occurrence : Amphistegina vulgaris (including lessonii) is 

 in recent seas mostly confined to tropical and subtropical latitudes 

 and as a rule is found in shallow water. It has been recorded 

 as a fossil from the Eocene of France and Bavaria. It is very 

 characteristic of the Miocene deposits generally and has been 



