On some Tertiary Foraminif era from Borneo. 245 



XL. — On some Tertiary Foraminifera from Borneo collected 

 by Professor Molenyraaff and the late Mr. A. II. Everett^ 

 and their Comparison icith similar Forms from Sumatra. 



By R. BuLLEN Newton, F.G.S., and Richard Holland. 



[Plates IX. & X.] 



Contents. 



Introduction. 



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



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



(3) Professor Molengraaff's Specimens. 



(4) Age of the Specimens. 



Desckiption of the Foraminifera. 



(A) Nummulites : 



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

 (3) Djokdjolcart<x, Martin. 



(B) Orbitoides: 



(4) Orbitoides {Lepidoci/dina) Verbeeki, ap. n. 



(5) ( ) sumatrensis, Brady. 



(6) (Discoct/clina) stellata, d'Archiac, 



(7) Other Orbitoides. 



(C) Linderina : 



(8) Linderitia, sp. indet. 



(D) Cycloclj'peus : 



(9) Cyclocli/pcus ?, sp. indet. 



(E) Other Foraminifera : 



(10) Miliolina, Spirolocttlina P, Planispirina, kc. 



Introduction. 



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

 — The presence of a Nanimulitic formation in Borneo appears 

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

 his explorations in the southern part of the country (Riatn 

 Kiwa district), although the fact was not published until 

 1857 *, several years after his death. 



C de Groott next refers to the same rocks as containin'>- 



* Anon., "De Steenkolen in het rijk van Bandjerniassin," Tijdsch. 

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

 written about 1844). 



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

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



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



