is, i Dickerson: A Fauna of the Vigo Group 7 
This fauna flourished in slightly deeper, or at least quieter, 
water as one specimen of the fragile Placuna placenta with 
both valves splendidly preserved shows that the specimen was 
not within strong wave action. The preservation of the other 
species is remarkably fine. The strata at this locality are nearly 
vertical, a good dip and strike being obtainable in the middle 
of the stream. 
The following species were obtained from locality 4x, Phil- 
ippine Islands, Luzon, Tayabas Province, Bondoc Peninsula, west 
side of Ragay Gulf, Bahay River ; 320 meters east of the mouth 
of Apad Creek in road cut 60 feet above the river in yellow 
sandstone, about 50 feet stratigraphically above the brackish 
water fauna in the lignitic strata of locality 5. Colls., Roy E. 
Dickerson and Mark Fuken. 
Species from locality Ux. 
Architectonica pictum (Philippi) ; 
living. 
Cerithidea cf. omata Hinds; 
living. 
Cerithium bandongensis K. 
Martin. 
Columbella bandongensis K. 
Martin. 
Conus omatissimus K. Martin. 
Cypraea sp. 
Delphinula? 
Delphinula reeviana Hinds. 
Eburna ambulacrum Sowerby; 
living. 
Marginella. 
Melania asperata Linnaeus. 
Mitra bucciniformis K. Martin. 
Mitra junghuhni K. Martin. 
Mitra javana K. Martin. 
Area ferruginea Reeve; living. 
Corbula socialis K. Martin. 
Chione chlorotica Philippi; living. 
Glycimeris viteus (Lamarck) ; 
living. 
Pecten cf. pseudolima Sowerby; 
living. 
Nassa costellifera A. Adams; 
living. 
Nassa crenulata (Bruguiere) ; 
living. 
Natica spadicea Reeve; living. 
Phos roseatus Hinds; living. 
Ranella tuberculata Broderip ; 
living. 
Ricinula spectrum Reeve; living. 
Rostellaria fusus Linnaeus; living. 
Rostellaria crispata Kiener ; 
living. 
Strombus sp. a. 
Terebra javana K. Martin. 
Terebra bidneta K. Martin. 
Trochus sp. 
Turris marmorata (Lamarck) ; 
living. 
Turris ( Surcula ) flavidula La- 
marck; living. 
Pecten cf. cristularis Adams and 
Reeve; living. 
Pecten cf. radula Linnaeus; living. 
Pecten ( Pleuronectia ) pleuronecta 
Linnaeus; living. 
Placuna placenta Linnaeus; living. 
Solecurtus quoyi Deshayes; living. 
Spondylus sp. 
