326 The Philippine Journal of Science 1913 



Fossils collected at locality 63. 



Conus indet. Turbo borne'ensis (?) Bttg. 



Pecten senatorius Gmel. -f- Trochus sp. 



Mitra indet. Bulla ampulla Linn, -f 



Xenophora indet. Oliva indet. 



Spondylus imperialis Chem. + Pattalophyllia sp. + 



Operculina costata d'Orb. + Cycloseries sp. 



Of the determinable fossils in these and the following lists, 

 those which represent living species are indicated by a plus sign. 



Fossils were obtained from the Cudiapi sandstone at three 

 different places, as follows: (1) Fossil locality 65, calcareous 

 sandstone immediately beneath the Upper limestone in the hills 

 north of Malumbang Plain, adjacent to fossil locality 61; (2) 

 fossil locality 4, calcareous sandstone beneath the Upper lime- 

 stone about 450 meters south of Balinsog Hill, at an elevation 

 of 360 meters; (3) fossil locality 13, sandstone, at an elevation 

 of 270 meters on the high ground between Apad and Milipilijuan 

 Creeks, affluents of the Bahay River. The Upper limestone does 

 not occur over the sandstone at this place, but the sandstone 

 itself is very calcareous. 



The fossils from the Cudiapi sandstone were determined as 

 follows : 



From fossil locality 65. 

 Pecten sp. Dosinia sp. 



Schizaster subrhomboidalis Herkl. 



From fossil locality U. 

 Turbo sp. indet. Pleurotoma sp. indet. 



Nassa sp. indet. Melania sp. indet. 



Fusus sp. indet. 



From fossil locality 13. 



dementia sp. indet. Cerithium herklotsi K. Mart. 



Xenophora dunkeri K. Mart. Pleurotoma tjemoroensis K. Mart. 



Ostrea orientalis Chem. (?) + Pleurotoma carinata Gray. + 



Pecten senatorius Gmel. + 



Fossils from limestone at a horizon corresponding stratigraph- 

 ically with that of the Lower limestone were collected at three 

 localities, namely : Fossil locality 44, at the mouth of Ayoni River ; 

 fossil locality 59, on a prominent hill (elevation, 250 meters) 

 2 kilometers west of Tala; and fossil locality 25, near Tambo, 

 a barrio of San Narciso. However, as' will appear in the dis- 

 cussion of the field relations at these localities, only the last group 

 in the foregoing list represents certainly the Lower limestone; 

 the fossils from the other localities may belong to either the 

 Upper or Xower limestone. 



On the north side of Ayoni River near its mouth, fossils were 



