On some Tertiary Foraminifera from Borneo. 215 



XL. — On some Tertiary Foraminifera from Borneo collected 

 by Professor Molengraaff and the late Mr. A. H. Everett, 

 and their Comparison with similar Forms from Sumatra. 

 By R. Bullen Newton, F.G.S., and Richakd Holland. 



[Plates IX. & X.] 



Contents. 



Introduction. 



(1) Previous Work on the Tertiary Foraminifera of Borneo. 



(2) The late Mr. A. H. Everett's Specimens. 



(3) Professor Molengraaff's Specimens. 



(4) Age of the Specimens. 



Description of the Foraminifera. 



(A) Nummulites : 



(1 & 2) Nummulites javanus, Verbeek. Forms B and A. 

 (3) Djokdjokart<s, Martin. 



(B) Orbitoides: 



(4) Orbitoides {Lepidocyclind) Verbeeki, sp. n. 



(5) ( ) sumatrensis, Brady. 



(6) (Discocyclina) stellata, d'Archiac. 



(7) Other Orbitoides. 



(C) Linderina : 



(8) Linderina, sp. indet. 



(D) Cycloclypeus : 



(9) Cycloclypeus ?, sp. indet. 



(E) Other Foraminifera : 



(10) Miliolina, Spiroloculina? , Planispirina, &c. 



Introduction. 



(1) Previous Work on the Tertiary Foraminifera of Borneo. 

 — The presence of a Nummulitic formation in Borneo appears 

 to have been first recognized by Dr. Schwaner in 1844 during 

 his explorations in the southern part of the country (Riam 

 Kiwa district), although the fact was not published until 

 1857 *, several years after his death. 



C. de Grootf next refers to the same rocks as containing 



* Anon., "De Steenkolen in bet rijk van Bandjermassin," Tijdsch. 

 Nederl.-Indie, 1857, vol. li. pp. 129-156 (from papers left by Dr. Schwaner, 

 written about 1844). 



t "Zuid- en Oosterafdeeling van Borneo," Nat. Tijdsch. Nederl.-Indie, 

 1857, vol. xiv. pp. 40-49. 



Ann. & Mag. N. Hist. Ser. 7. Vol. iii. 18 



