394 AULILNS. Th, ILIBIE 
the series attains a somewhat notable thickness, due mainly to 
the presence of strata younger than those represented in the 
section. Nearly all the layers of the section are more or less 
fossiliferous, but the most productive horizons are about 150 
feet from the base. The 28-foot shale yielded thirty species. 
Some of these species were found at each of the horizons col- 
lected from. The lower 100 feet yielded few fossils, but none 
were found which could be referred to the Lower Carboniferous. 
My collections were submitted to Dr. Stuart Weller, who 
very kindly identified the species for me and furnished the fol- 
lowing lists: Zaphrentis sp. undet., Orbiculoidea convexa Shum., 
Orbiculoidea missouriensis Shum., Chonetes mesoloba N. & D., 
Productus longispinus Sow., Productus costatus Sow., Productus 
cora D’Orb., Spirifer cameratus Morton, Spirifer rockymontana 
Marcou., Reticularia perplexa McCh., Seminula argentea Shep., 
Aviculopecten carboniferus Stev., Astartella concentrica McCh., 
Nucula ventricosa H., Nuculana bellistriata Stev., Pelecypod 
(genera and sp. undet.), Bellerophon percarinatus Con., Belle- 
rophon carbonarius Cox., Bellerophon montfortianus N. & P., 
Bellerophon sp. undet., Rotella verrucelifera White, Soleniscus 
brevis White, Soleniscus sp. undet., Sphaerodoma texana Shum., 
Sphaerodoma sp. undet., Trachydomia wheeleri Swall. var., 
Naticopsis altonensis McCh., Naticopsis altonensis var. gigantea 
M. & W., Pleurotomaria perizomata White, Pleurotomaria (several 
small species undet.), Murchisonia copei White, Orthoceras sp. 
undet., Syringopora sp., Campophyllum torquium Owen, Strapa- 
rolus catilloides Con. 
A few fossils were found as loose fragments and _ their 
horizons not determined. They are as follows: Derbya crassa 
M. & H., Hustedia mormoni Marcou., Allorisina subcuneata 
M. & H., Schizodus wheeleri Swall., Bellerophon (large sp. 
undet.), Temnocheilus winslowi M. & W., Phillipsia sp., large 
fish spine. 
A small collection was also obtained from the western slope 
of Veta Pass, five miles above Placer. The section here is com- 
posed of sandstones, limestones, shales, and conglomerates simi- 
