4 CALIFORNIA ACADEMY OF SCIENCES FProc. 4th Se«. 



periclotites from which they were probably derived. At times 

 the material contained in the Vigo sandstones is very coarse, 

 and conglomerates occur locally in the Bondoc Peninsula and 

 on a great scale in northwest Leyte, east of the barrio of Taba- 

 bunga, where they in part resemble characteristic desert con- 

 glomerates closely. Such materials could not have been trans- 

 ported great distances and it is probable that a land mass or 

 masses lay to the east of the site of the Bondoc Peninsula and 

 northwestern Leyte. In other words the sediments of the Vigo 

 group were deposited in the moderately deep waters of an 

 inland sea with high mountainous islands to the east. The 

 total time represented since the beginning of the Vigo is evi- 

 dently long, and, on these grounds as well as faunal. the Vigo 

 group appears to be as old as the Miocene, and the Malumbang 

 probably represents at least a portion of the Pliocene. The 

 time represented by the unconformity between these horizons 

 was sufficiently long to reduce many of the mountains formed 

 at the close of Vigo time to nearly base level before the region 

 was again gradually lowered to receive its great load of Malum- 

 bang coralline limestone and associated marls in the clear, 

 warm, shallow waters of a tropical Pliocene sea. Likewise the 

 orogenic movements which ended Malumbang time and the 

 erosion interval which preceded the formation of Pleistocene 

 terraces were not brief. The age of the Vigo group will be 

 discussed at length after its fauna is considered. 



Fauna 



The fauna upon which this paper is based was obtained from 

 the Bahay River vicinity (2X, 3X, 4X, 5X) ; the canyon of 

 Dumalog Creek (9X) ; and from Sapa Tubigbinukot, the 

 northern extension of the Amoguis (Amougis), Agipot, Pag- 

 sanhan* River (11X), from strata which are all unmistakably 

 members of the Vigo group and unconformably below the 

 Malumbang formation. 



The following notes upon the collection localities and their 

 fossils are given in detail as there are but few places in these 

 beautiful islands where good collections are obtained from 



* Different local names for same stream. 



