( 246 ) 



from tli(! ('Xiuniiialidii o{ the fossils forwanJetl by him to Leyilcii it 

 was iKissilile to point out inter alia tlie existence in Borneo of a 

 Jurassic system '). 



His last consignments from the basin of the Kapoeas contained 

 sedimentary rocks with hundreds of fossils upon wiiich I wish to give 

 some preliminary information. Of the objects to which I wish parti- 

 culaily to draw attention only a few have been collected at the 

 main river somewhat below the mouth of the Melawi whereas ihc 

 greater portion were found in the region of the last named impoitant 

 left branch of the Kapoeas. The localities are situated either on the 

 said Melawi or on its tributaries the S. ~) Kajan and the S. Tebidah 

 whieh flow into the Ö. Kajan. Taken altogether the fossils have been 

 collected in ten different places and an examination of important 

 material containing numerous organic remains from most of these 

 localities was possible. This examination however proved to be rather 

 difficult, the objects being as a rule exceedingly brittle thus requiring 

 to be prepared with the greatest care which could only be done 

 with the aid of a needle. 



The fossils are embedded in clay some of which contains calcium 

 carbonate and turns into marl ; in some cases they also form the 

 oi'ganic centres of marl concretions. In other cases the clay becomes 

 sandy and often it serves only as the cementing material which keeps 

 the thick mass of fossils togetlier. Shell-breccia are numerously 

 represented. 



Among many liundred specimens of shells and periwinkles obtained 

 from this material, only seven species can be named viz. Area mela- 

 vieiisis spec, nov., Cijrena snhtrigonalis P. G. Krause, Cyrena sub- 

 rotumlata P. G. Kkause, Corbula dajaceusis P. G. Krause, Melunia 

 melavk'Hsis spec, nov., Pahalonius (jrncilis P. G. Krause spec, and 

 Paladomus crassa P. G. Krause spec, but the greater part of these 

 species vary so much as to render the determination very difficult. 

 The material collected by G. A. F. Molengraaff at the upper 

 Kapoeas especially at the S. Pinoh and the S. Lekawai (also branches 

 of the Melawi) on being examined by P. G. Krause was found to 

 contain also the above mentioned species; but the material at his 

 disposal for his researches being defective in several respects, he has 

 not been successful in giving a coniplcte determination of some species 

 {Area and Me/aiiia) while to others he has given different generic 

 names {Paludotniis). 



Having comi)ared the petrifactions of the ditferent localities in the 



>) See: Saiumlg. d. Geol. R. Museums in Lciilon. Lid. V. (Kualsh, M.vifirN, Vogel). 

 ') S = Soeugiii, Miiltiyau u;une for river. 



