206 The Philippine Journal of Science 1922 
cemented by limestone. The fossils are casts and the internal characters 
are difficult to recognize. The fauna is essentially composed of Orbitolites 
and Alveolinella, with Operculina costata var. tuberculata, Rotalia, Poly- 
stomella. This bed is indicated as above the coal and below the Lepido- 
cyclina limestone. This ought to correspond nearly to the horizon with 
Orbitolites and Alveolinella in Java which Mr. Verbeek places as stage m, 
that is to say, in the lower Aquitanian. Owing to the poor state of 
preservation of the fossils, this reference is only a provisional one. It is 
to be noted that Professor Martin announced the discovery by Semper of 
Orbitoides in a mine of Alpaco. 
2d. The best characterized horizon is the limestone with the large 
lepidocyclinas: 
Limestone of Guila-Guila (Cebu, locality 278). There occur numerous 
lepidocyclinas of large size; some present surfaces having well-developed 
tubercules and these have been referred to Lepidocyclina insulx-natalis; 
the others with but few if any tubercules have been assigned to Lepidocy- 
clina richthofeni. These two forms are very numerous; they are associated 
with a third species, a much smaller form composed of a central part, 
very swollen, bordered by a collarette; this is L. formosa, nearly free from 
tubercules, but it presents very thick walls between the chamberlets.. These 
various forms are often found free. 
There are places representing this same horizon, the limestones of the 
Barrio of Mesaba (Cebu locality 272) L. insulz-natalis; those of the valley 
of Cumajumayan (Cebu locality 28) L. richthofeni and L. formosa; the 
two latter forms occur together with a third species, L. inermis, which 
has thin walls between its cells, at Compostela mine (Cebu, locality (289). 
' $d. There is another horizon probably to be placed slightly higher, a 
soft limestone bed, cream white in color, which outcrops boldly in great 
escarpments along the road from Toledo to Cebu, on the edge of the Minanga 
River (locality 277, near camp 1); this presents upon its surface very 
well-preserved specimens of Operculina complanata and Cycloclypeus com- 
munis; this bed is correlated with the Silex marls of the Aquitanian of © 
Borneo. 
Burdigalian Stage. 
This upper horizon is characterized by the appearance of Miogypsina 
and by the abundance of small lepidocyclinas of the section L. (Nephrolep- 
idina) verbeeki. I refer the two following beds to the Burdigalian: 
A very soft sandy yellowish limestone of Gaba Bay, Island of Batan 
(locality 8) above the lignitic beds; there occur well-preserved but fragile 
forms, among which are Globigerina, Cycloclypeus communis, Amphistegina 
ef. mamillata, and a small Miogypsina, the last being referred to a Burdi- 
galian form occurring near Dax (France). 
A very soft white limestone which runs along the Cordillera Central of 
the Island of Cebu, Valley of Cotabato (locality 279); here occurs L. ver- 
beeki, which was first described by Mr. Warren D. Smith, but above all it 
is associated with L. inflata and numerous Miogypsina irregularis. 
Of these three faunas which I recognized, the second is characterized 
principally by the great abundance of large Lepidocyclina which has 4 
very great distribution from Madagascar to the Philippines. I recognized 
in my study upon the Foraminifera of the Tertiary of Borneo that they 
correspond to the Aquitanian; I have distinguished three horizons, E, F, G, 
which it ought to be possible to find in the Philippines when geological 
explorations are more advanced. 
