20, 2 Dickerson: Review of Philippine Paleontology 209 
millimeters broad in the thickened central portion. * * * This species 
has been referred by Douvillé to the lower Miocene. 
* This Lepidocyclina fauna occurs in the upper portion of the 
Vigo group, the Canguinsa formation. This formation, in this 
same region, has yielded a large part of the mollusks reported 
above, and it is clear that the vertical range of the large repre- 
sentatives of the genus Lepidocyclina is much greater than Dou- 
villé suspected. 
H. Yabe,** in a recent publication, recognizes this possibility 
and he reviews the case as follows: 
e 
L. Rutten studied foraminiferal rocks from*southern and eastern parts 
of Borneo and found it necessary to modify somewhat H. Douvillé’s 
correlation of the Tertiary rocks, because Lepidocyclina appeared to him 
to have a more extended vertical range than was believed by Douvillé. 
Thus the oldest Miocene and Oligocene deposits, according to Rutten are 
characterized by Lepidocyclinas of larger and smaller sizes, while the 
smaller ones alone are found together with Miogypsina in all parts of 
Miocene deposits except the lowest division. 
Rutten ** presents a table in his paper which is copied by Yabe. 
Yabe,”* in another and later paper upon the Lepidocyclina lime- 
stone from Cebu, recognized Lepidocyclina (Nephrolepidina) 
angulosa Provale associated with Lepidocyclina monstrosa Yabe, 
Lepidocyclina formosa Schlumberger, and several other Foram- 
inifera. It is evident from this assemblage that the section 
Nephrolepidina is not restricted to the uppermost horizon, as 
Douvillé thought. 
Briefly, in conclusion, then, the Lepidocyclina limestone is 
equivalent to the shales and sandstones of the Vigo group, and the 
molluscan faunas of the latter beds are equivalent to the large- 
sized Lepidocyclina fauna of Cebu. In other words, the lime- 
stones, shales, sandstones, and coal are different depositional 
facies within the same group, the Vigo of probable Middle and 
Upper Miocene age. 
The corals of the Vigo group are not well known, and many 
forms await careful description. In general, the corals of this 
group are either individual or slender branching forms, and this 
* Yabe, H., Notes on a Carpenteria limestone from B. N. Borneo, Science 
Reports Tohoku Imperial Univ. II 5* (1918) 2. 
* Rutten, L., Studien tiber Foraminiferen aus Ostasien, Samml. d. Geol. 
Reichsmuseum I 9 (1911-1914) 287. ; 
“Yabe, H., Notes on a Lepidocyclina limestone from Cebu, Science Re- 
Ports Tohoku Imperial Univ. II 5? (1919) 1. 
