352 



SMITH. 



ao- 



boanga a great load of detritus which afterwards turned its course to the 



east. A slight warping of the coastal plain 

 would also explain this eccentricity. 

 ) 



THE INTERMEDIATE UPLANDS. 



Under this heading is comprised all the ter- 

 ritory lying between the plains and the Cordil- 

 leras. With the exception of the range east of 

 the Agusan Kiver, the Kulingtang Mountains 

 south and east of Lake Lanao, and the range 

 of low mountains in the Zamboanga Peninsula, 

 there is no distinct cordillera in Mindanao and 

 the ranges cited are not of sufficient height and 

 continuity to place them exactly in that category. 

 By far the largest portion of the area of 

 Mindanao then should be considered as simply 

 % upland country. We have seen that the central 

 9 plain of Mindanao is fairly low. The prin- 

 g cipal upland areas, therefore, are the peninsular 

 g portion south of Lakes Liguasan and Buluan, 

 § known in part as the Tiruray Tableland; the 

 § Lake Lanao upland follows; then, third, prac- 

 ° tically all of Zamboanga Peninsula ; and, fourth, 

 3 the tract in which rise the Sahug, Sabul, and 

 g Agusan Eivers. 





\« 



THE TIRURAY TABLELAND. 



The Tiruray tableland is practically un- 

 explored. I have been on the edge of it near 

 Tamontaca and have sketched the southern sky- 

 line to the south. (See fig. 1.) Several prom- 

 inent points, Mounts Blik, Itim-Itim, etc., rise 

 above' the tableland; their elevation is between 

 366 and 457 meters. The people inhabiting 

 this territory are Tirurays, a degenerate band 

 of Moros, Manobos, and Tagabilis, all pagans. 



THE LAKE LANAO UPLAND. 



This tract, bounded on the north by Iligan, 

 on the south by Illana, on the west by Panguil 

 Bay, and on the east by the Kulingtang Eange, 

 is one of the most interesting in all the Philip- 

 pines. The average elevation is about 610 

 meters. Lake Lanao is 686 meters above the 

 sea, but some of the country to the west is lower, 



