ORBITOIDES FROM THE BINANGONAN LIMESTONE. 
(WITH SOME NOTES ON EARLY CONNECTIONS BETWEEN FORMOSA, 
THE PHILIPPINES, AND JAVA.') 
By W. D. Smiru. 
(From the Division of Mines, Bureau of Science.) 
On looking over some samples of fossiliferous limestone collected by 
Mr. H. M. Ickis, of this Bureau, from the classic Binangonan locality, 
some forms which resembled Orbitoides were noted. Some time later it 
was possible for the writer to make a trip to this same locality, on which 
occasion he collected more material and obtained some data with reference 
to the field relations of the formations. 
On closer study, the forms were seen to be, without an exception, 
species of Orbitoides, and no Nummulites were detected. However, 
Richthofen * may have seen Nummulites there also. Thin sections were 
made and studied in connection with the admirable sections of similar 
forms from Formosa and the Riu Kiu Group,* which were sent by 
Professor Koto, of the Imperial University of Tokyo, to Messrs. Newton 
and Holland and described by them. 
In 1862 the late Baron von Richthofen visited a limestone quarry about 
4} mile northeast of the pueblo of Binangonan on Laguna de Bay, 
and, according to his account, collected some Nummulites, and ever since 
that date this formation has remained unquestioned, save by Mr. Becker, 
and referred to the Eocene. So far as we know, Richthofen never figured 
or described these forms. 
‘This paper the writer intends to serve as an introduction to a field of 
investigation which he has been assigned to develop as time and opportunity 
permit, This field, as interesting and important as it is from a scientifie point 
of view, must be made subordinate to the economic work which the writer and 
his colleagues of this Bureau are at present engaged in. However, it is hoped 
that articles bearing on this and related subjects will from time to time appear 
in the numbers of this JOURNAL. 
Many statements herein may have to be modified as future work progresses, 
so that the present conclusions should be regarded more in the light of a working 
hypothesis than as a definite and final opinion. 
* Zeitschr. d. geol. Gesell. (1862), 14, 357-360. 
*R. B. Newton and R. Holland: “On Some Fossils from the Islands of Formosa 
and Riu Kiu,” reprinted from Jr. Coll. Science Imp. Univ. Tokyo (1902), 17, 
art. 6. 
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