488 DEPARTMENT OF THE INTERIOR 



2 GEORGE V., A. 1912 



Animal remains: 

 ' 1432 : 



Pecten operculiformis Gabb. 

 Trigonia sp. Fragmentary imprint. 

 Eriphyla ? sp. Small casts. 

 Pleuromya ? sp. Fragmentary imprint. 



Rissoa f sp. A small obscure gasteropod with the general 

 form and sculpture of this genus. 

 1434 : 



Serpula f sp. 



Pecten operculiformis Gabb. 



Trigonia sp. Belated to T. azquicos&ata Gabb, and T. mauden- 



sis White aves. 

 Eriphyla ? sp. Small casts. 

 Pleuromya papyracea Gabb. 

 Ancycloceras remondi Gabb. ? Fragment. 

 Ancycloceras ? sp. 

 Hamites ? sp. 



Lytoceras tatesi (Trask) ? Fragmentary small specimen. 

 Belemnites impressus Gabb. ?. Fragmentary imprint. 

 Horizon: Regarding the animal remains, Dr. Stanton writes: 



' The two lots from Castle creek, numbered 1432 and 1434, evidently 

 belong to the same fauna. The horizon is clearly Cretaceous and apparently 

 within the limits of the Horsetown formation.' 



Nos. 11135-86. 7,000-foot contour, 350 yards east of 7,622-foot peak five 

 miles nearly due east of Castle Peak. 



Stratigraphic position : 2,300 feet below top of member E. 

 Fossils: plants and (1435) one fossil marine shell. 



Professor Penhallow found that the plant remains of 1436 consist, 

 apparently, of fragments of the rachises of ferns which remain indetermin- 

 able, although he is inclined to consider them as derived from the one 

 species Gleichenia gilbert-thompsoni, thus relating this horizon to that of 

 1428. 



Dr. Stanton writes : ' The specimen numbered 1435, which according 

 to your section comes from a much higher horizon than 1432 and 1434, has 

 not been identified, but it is suggestive of Tertiary rather than Cretaceous. 

 It is a marine shell.' He described the shell thus : 



' Lucina ? sp. A single large Lucinoid shell whose generic characters 

 have not been determined. Its size and external features suggest some of 

 the Tertiary and living shells that bave been referred to Miltha and Pseu- 

 domiltha.' 



Horizon: probably Cretaceous (Upper Cretaceous), since member L includes 

 at least one bed in which impressions or casts of ammonite shells were seen, 

 and there is little doubt that L truly overlies K. 



