FOSSILS FROM THE RICHMOXD MFNE. 43 



to the preservation of fossils are rarely met with, even the ealcareons shale 

 presenting but slight indi(;ations of them. Not till within 300 or 400 feet of 

 the summit of Prospect Mountain limestone and 2,000 feet higher up in the 

 strata was there any grouping of fossils observed. From this horizon, and 

 extending up to the base of the Secret Canyon shale, numerous localities 

 occur all along the east slope of Prospect ]\Iountain, which present a fauna 

 with much the same grouping at each, and showing a mingliug of both 

 Georgia and Potsdam faunas. 



These organic forms occur both in compact limestone and .shalv calca- 

 reous beds, and constitute the third and upper fossiliferous strata of IVospect 

 Mountain limestone. The following list contains most of the species col- 

 lected at this horizon in New York Canyon, many of them being found at 

 several localities : 



Obolella (like O. pretiosa). Protypus .sonectus. 



Lingula manticula. Dicelloceijhalus nasutus. 



Aguostus commiuiis. Ptychoparia oweni. 



Agiiostus bideus. Ptychoparia occidcutalis. 



Aguostus ueon. Ptychoparia dissiiuilis. 

 Agnostus richmondeusis. 



From the coiTesponding beds in Secret Canyon near Geddes and Ber- 

 trand mine, and in a compact black limestone a short distance above the 

 base of the Secret Can5^on shale belt, were collected the following species : 



Kutorgina whitfieldi. Agnostus neou. 



Orthis eiu'ekensis. Protypus expausus. 



Stenotheca elongata. Ptychoparia oweni. 



Agnostus communis. Ptychoparia haguei. 



Agnostus bidens. Olenoides spiuosa. 



In a well defined stratified black limestone exposed for several hundred 

 yards on the seventh level of the Richmond mine were obtained the following 

 forms: 



Obolella . Agnostus neou. 



Lingula manticula. Agnostus richmondensis. 



Aguostus communis. Ptychoparia oweni. 



Agnostus bidens. 



The finding of this groui^ing of fossils in the mine is of some special 

 importance as it adds paleontological proof to structm'al evidence to show 



