424 The Philippine Journal of Science 1923 



From this locality 200 meters north of the stock farm, 68x, 

 the following fauna has been obtained: 



Fungia sp. Clavella sp. 



Porites (?) sp. Columbella bandongensis K. 



Area ferruginea Reeve. Martin. 



Avicula sp. Conus cf. hardi K. Martin. 



dementia papyracea Gray. Conus javanus K. Martin. 



Cardium sp. Mitra javana K. Martin. 



Dosinia lenUcularis Sowerby. Nassa cf. costellaria A. Adams. 



Macoma sp. Nassa crenulata Bruguiere. 



Dentalium heptagonum Boetfc- Natica sp. 



ger. Nyctilochus (Tritonium) sp. 



BuUaria sp. Sigaretus sp. 



Cassidaria sp. Strombus cf . swernisowi Reeve. 



Cerithium javanum K. Martin. Vermetus javanus K. Martin. 



Cerithium jenkinsi K. Martin. Vicarya callosa Jenkins. 

 This fauna is clearly referable to the Vigo-Miocene. 



The most-prominent topographic features of the Baguio Pla- 

 teau are connected with the erosion forms of the Malumbang 

 coralline limestone, Mount Mirador, and Trinidad Valley. The 

 best section for the study of this formation is found in the gorge 

 of Trinidad Valley (Plate 5, figs. 1 and 3). 



MALUMBANG FAUNA 



The coralline limestone in this vicinity has yielded a fauna 

 equivalent to that of the Malumbang formation of Pliocene age. 



AREAL DISTRIBUTION OP MALUMBANG FORMATION 



While in Baguio during December, 1920, Mr. John Reavis told 

 Dr. Warren D. Smith and the writer of an interesting occur- 

 rence of fossils at his place, Klondike's Springs, in lower Bued 

 River Canon (Plate 6, fig. 1). On our way to Manila we inves- 

 tigated this locality ; although the fossils found in the conglom- 

 erate were sparse, we succeeded in finding several fragments 

 of coral rock which contained several species of coral. 



These species are forms common in the Malumbang-Pliocene, 

 and they represent either reworked Malumbang limestone after 

 uplift and subsequent erosion or fragments broken off of coral 

 reefs which lived in the Malumbang sea and were washed into 

 a gravel beach that existed during Malumbang time. It is 

 evident that many of the folded strata in Bued River Canon 

 are much younger than was previously thought and that the 

 greatest possible age assignable for these conglomerates at 

 Klondike's Springs is Malumbang-Pliocene. As suggested 



