116 ADAMS. 



Plate XII. 



Fig. 1. Antipolo Falls, on railway to Antipolo. 

 2. Botocan Falls, east of Majayjay. 



Plate XIII. 



Fig. 1. First falls, Pagsanjan Gorge. ' 

 2. Upper falls, Pagsanjan Gorge. 



Text Ftgubes. 



Fig. 1. Index map showing physiographic regions of Luzon. 



2. Sketch map showing probable land areas before the emergence of the 



central plain and the plains of the southwestern volcanic region. 



3. Shark's teeth (Squalidae?) found in a railway cut in water-laid tuff 



on the crest of the ridge between Bay Lake and Manila Bay. 



4. Mammalian tooth (cf. antelopes of the Siwalik Pliocene of India) found 



at a depth of between 81 and 85 meters in drilling a well at Pasig. 



5. General geologic section, Infanta to Tanay, Ickis. 



6. Sketch map. of the geology and topography of Mount Maquiling and the 



surrounding country, as mapped by Abella. 



7. Sketch showing the extinct cinder cone Cerro de la Mesa, and outer 



crater rim as seen looking south from Calamba railway station. 



8. Sketch of the tufaceous area of Taal Volcano as mapped by Centeno. 



9. Sketch showing the relations of Tagay-tay ridge and the upland on the 



northeast border of Taal Lake as seen from Lipa Point. 

 10. Profile of' the gorge of the Mariquina Kiver at the head works of the 

 Manila water supply, showing river terraces cut in limestone. 



Maps. 



1. Geologic reconnaissance map of southwestern Luzon. 



2. Topographic map of Taal Island. 



