408 jB. BuUen Newton — Fossils from Saraicak, Borneo. 



Professor K. Martin ^ to aboliali Von Fritsch's supposed new species 

 in favour of the more typical form of the genus PatelUna (Orbulites) 

 concava, Lamarck, a fact of considerable importance, since it enabled 

 him to fix upon the Cenomanian stage of the Cretaceous series 

 as the definite horizon for these particular beds of Western Borneo. 

 In 1883 some molluscan and other remains were obtained from near 

 Snjor on the river Seberuang through Mr. E. D. M. Verbeek,^ and 

 examined by Dr. H. B. Geinitz ^ and Dr. G. Bdttger, who both 

 I'egarded them as of Lower Senonian age. They were determined 

 as follows * : — 



Natica cf. Gentii, Sby. {canaliculata, Vola cf. quadricostata, Sby. 



Mant.). Modiola cf. capitata, Zittel. 



N. lamsllosa, Rom. Gervillia cf . so/enoides, Defr. 



Fhasianella, sp. Spondylus, sp. 



Avellana, sp. Lima, sp. 



Fanopea cf. gitrgitis, Brong. Area, sp. 



P. cf. mandibida, Sby. Ontrea, sp. 



Fholadomi/a [Goniomya) desiffnata, Goldi. Hemiaster Regulusanus, D'Orb. 



Astarte, sp. S. suhlacunosus, Gein. 



Triffonia ci. limhata, D'Orb. H. plebejus, Nov&,k. 



Lyonsia cf . Germari, Gein. Fatellina, sp. 



An interesting Cretaceous fauna was next discovered at numerous 

 localities in the Martapura district of the south-eastern part of the 

 island, which has been fully monographed by Professor K. Martin.* 

 The remains of some Rudistiform shells were first described under 

 Sphcerulites and Badiolites, but without specific names on account of 

 their imperfect preservation, though supposed to show some 

 relationship to Stoliczka's species from Southern India, Badiolites 

 mutabilis and Sphcerulites Indica. A second memoir dealt with the 

 remaining groups of these fossils, embracing the Echinoids, 

 Brachiopods, Lamellibranchs, Gasteropods, and Cephalopods. The 

 entire fauna was regarded as of Upper Cretaceous age, and on 

 account of its resemblance to Southern Indian forms Martin 

 recognized it as equivalent to the Arrialoor group of that country. 

 The complete list of these specimens is as follows : — 



Cidaridarum, sp. indet. Ostrea [E.) Borneensis, sp. nov. 



Terebratula Butempleana, D'Orb. Ostrea, sp. indet. (4-5 species). 



T. {Terebratella'^) Borneensis, sp. nov. Fecten, sp. indet. 



Ostrea lExogyra) ostracina. Lam. Tola qtiinqiiecostata, Sby. 



0.{Alectryonia) Martapurensis, s'p. nor. Modiola Hoozei, sp. nov. 



^ " Untersucliungen ueber den Ban von Orbitolina {Fatellina, auct.) von Borneo " : 

 Sammhmgen geol. fi.-Mus. Leiden, 1890, No. 20, voL iv, part 7, pp. 2U9-231,. 

 pis. XX iv, XXV. 



* " Over het voorkomen van Gesteenten der Krijtformatie in de Residentie "Wester- 

 afdeeling van Borneo" : VersL Med. K. Ak. Wetenscbappen, 1883, voL xix, p. 39. 



^ "Ueber Kreidepetrefacten von West- Borneo " : Zeitseb. deutscb. geol. Ges. 

 1883, vol. XXXV, p. 204. 



* The nomenclatnre given in tbese lists of fossils is tbat of tbe autbors themselves, 

 no revision of the same having been attempted by the present writer. 



^ ' ' Ueber das vorkommen einer Rudisten f uebrenden Kreidef ormation im 

 Suedoestlichen Borneo"; "Die Fauna der Kreidef ormation von Martapoera " : 

 SamniluDgen geol. R.-Mus. Leiden, 1889, Nos. 18, 19, vol. iv, parts 4, 5, 

 pp. 117-197, pis. xiii-xxi. 



