1.48 PROCEEDINGS OF THE PALEONTOLOGICAL SOCIETY 



GEOLOGIC OCCURRENCE OF THE HARDGRAVE JURASSIC FAUNA OF BURNS, 



OREGON 



BY E. L. PACKARD AND R. N. NELSON 



(Abstract) 



The lower Jui'assic of eastern Oregon has lieretofore been known only 

 through the meager fauna early obtained by Thomas Condon from Silvies 

 Canyon, Harney County. The fauna was recently found to occur in a .series 

 of sedimentary and associated intrusive rocks outcropping only within the 

 canyon of Silvies River. This series includes red impure limestone, light- 

 colored limestone, fine-grained shale, arenaceous shale, arkosic sandstone, and 

 basic Intrusives. The fauna of nearly fifty species is mainly confined to the 

 red impure limestone, though occasional specimens were found in the shale 

 members. The beds apparently are dipping steeply southward and are uncou- 

 formably overlain by supposed Columbia River lava, 



^.A^ ADDITION TO THE MARINE MAMMALIAN FAUNA OF NEWPORT, OREGON 



BY E. L. PACKARD 



(Abstract) 



The Newport region of Lincoln County, Oregon, has already yielded teeth of 

 Desmostylus sp., obtained by Condon from the beach of Yaquina Bay ; a skull 

 of Desmatophoca oref/onensis Condon, and recently discovered cetacean re- 

 mains. Stratigraphic studies make it apparent that these mammalian speci- 

 mens were all derived from the Monterey Miocene, which is well exposed at 

 Newport and which has yielded a characteristic invertebrate fauna. A nearly 

 complete cetacean skull, lacking the distal ends of the mandibles and portions 

 of the squamosals ; a niunber of vertebrse, several ribs, and various elements 

 of the pectoral girdle, including fairly well preserved scapuljip, were found in 

 the ocean beach west of Newport. Preliminary studies indicate that this speci- 

 men should be referred to the Balfenidfe, but its generic position is as yet 

 undetermined. 



TRIGONINJ^J OF THE PACIFIC COAST OF NORTH AMERICA 

 • BY E. L. PACKARD 



(Abstract) 



The oldest Trigonia fauna of the west coast of North America occurs in the 

 Hardgrave Lower Jurassic of Taylorsville, California. The group Clavellatfe 

 and Costatfe are repi'esented by the two species, both of which are related 

 to southern Asiatic forms and one of which may well be taken as ancestral to 

 a Middle Jurassic species. The third group of the genus, the Undulato?. is 

 represented in the Middle Jurassic of the Cordilleran region, while the Glabrfp, 

 Scabrj?. and Scaphoidea are known from the Mormon Jurassic of California. 

 The genus is not I'epresented in the Knoxville Cretaceous. The Horsetown 

 and Chico faunas include 12 species and one variety, seven of which are new. 

 One of these is considered a new variety of a Japanese species. 



