18,1 Dickerson: A Fauna of the Vigo Group 15 
millimeters broad in the thickened central portion. Lepidocyclina richt- 
hofeni Smith was identified among these. This species has been referred 
by Douvillé to the lower Miocene. 
No definite age determinations can be made from the fossils in the 
Canguinsa sandstone proper. The fossils in the included limestone, how- 
ever, are well known and have been used in correlation by various authori- 
ties. From their presence it is concluded that the Canguinsa sandstone 
should be placed in the middle Miocene, extending, perhaps into the lower 
Miocene. 
In a recent publication, Prof. H. Yabe ® gives a full discussion 
of correlation of these equivalent beds in Cebu, and Smith’s and 
Douvillé’s correlation tables are quoted. It is noteworthy that 
the beds under discussion are classified by Douvillé as Aquitanian. 
All who have studied the large foraminifera from the Philippine 
Islands agree that one of the characteristic genera is Lepidocy- 
clina. Cushman’ in a recent paper makes the following signifi- 
cant statement: 
Because in general Orbitoides with some modification to be noted in 
a future paper, is Cretaceous, Orthophragmina Eocene and Lepidocyclina 
Oligocene, much importance is attached to these organisms in the investiga- 
tion of problems of geologic correlation. 
From another point of view the age of the beds in question 
might depend upon the age determination of the overlying Ma- 
lumbang formation. Concerning the age of this formation, 
Pratt and Smith ™ state the case as follows: 
The most conclusive evidence as to the age of the Malumbang series 
is found in the Lower limestone, which, on the basis of the fossil Litho- 
thamnion ramosissimum Reuss * * * may be assigned to the Miocene. 
The upper beds in the series are apparently as young as the upper 
Miocene or the Pliocene. The formation is similar to the “étage marneux” 
which Verbeek assigns to the middle stage of the upper Tertiary for Java. 
Concerning the range of this species, Prof. H. Yabe ** notes 
the following: 
This reef building organism is very often cited from the limestone of 
the Oligocene and Miocene ages of the Indo-Pacific region, its occurrence 
being known from Japan, the Philippines, Borneo, Timor, Amboina, New 
Guinea and adjacent islands, New Hebrides, Victoria, the Christmas Is. etc. 
*Yabe, H., Notes on a Lepidocyclina limestone from Cebu, Science 
Reports (Geology), Tohoku Imperial Univ. No. 2, II 5 (1919) 40. 
* Cushman, J. A., Orbitoid Foraminifera of the genus Orthophragmina 
from Georgia and Florida, Prof. Paper 108 United States Geologic Survey, 
(1918) 115. : 
* Pratt, W. E., and Smith, W. D., Philip. Journ. Sci. § A 8 (1918) 327. 
*Yabe H., Notes on a Carpenteria-limestone from British North Bor- 
neo. Science Reports of the Tohoku Imperial Univ. (Geology) No. 1, II 
5 (1918) 14, 
