18, 1 Dickerson: A Fauna of the Vigo Group 9 
This fauna, though meager, is not distinct in any way from 
faunas listed above. As Pratt and Smith® point out, there is 
no evidence of any notable stratigraphic break here, and the 
stream in its meanderings so exposes the strata that exact obser- 
vations are possible. Their tentative evidence of an uncon- 
formity between the Canguinsa and the Vigo in Cambagaco 
Ridge near Vigo River is interpreted by the writer as a result 
of faulting. 
Locality 11x, Philippine Islands, Luzon, Tayabas Province, 
Bondoc Peninsula, on west bank of Sapa Tubigbinukot 400 
yards upstream from Sapa Yaknas; in soft, yellow sand- 
stone of Canguinsa age. October 31, 1919. Coll., Roy E. 
Dickerson. ‘The strata at this point dip west about 20° while 
the overlying Malumbang, a few hundred feet west, has a gentle 
dip of 2° to 3°. At other places in this vicinity a notable 
unconformity separates these two formations. The fauna 
listed below is especially noteworthy as being composed of 85.90 
per cent living species. Here again the stratigraphy is very 
satisfactory. 
Species from locality 11x. 
Architectonica pictum (Philippi) ; 
living. 
Cancellaria 
living. 
Cerithidea near dohrni, but detail 
differs. 
elegans Sowerby; 
Nassa crenulata (Bruguiere) ; 
living. 
Nassa reussi K. Martin? (may = 
N. costellifera Adams). 
Natica spadicea Reeve; living. 
Natica cumingiana Recluz; living. 
Cypraea sp. Ranella tuberculata Broderip; 
Ficus reticulata (Lamarck) ; living. 
living. Strombus swainsoni Reeve; living. 
Harpa = _ articularis Lamarck; Terebra bicincta K. Martin. 
living. Turris marmorata (Lamarck) ; 
Nassa_  thersites (Bruguiere) ; living. 
living. 
PELECYPODA 
Cardita antiquata Linnzus; living. Glycimeris angulatus (Lamarck) ; 
Cardium attenuatum Sowerby; living. 
living. . Ostrea. 
Cardium unicolor Sowerby; living.. Pecten pseudolima Sowerby; 
Clementia hyalina Philippi — C. living. | 
papyracea; living. Spisula sp. 
Glycimeris viteus (Lamarck) ; 
living. 
Vermetus javanus ? K. Martin. 
* Pratt, W. E.; and Smith, W. D., Philip. Journ. Sci. § A 8 (1913) 317. 
