MARYLAND AND WEST VIRGINIA ORISKANY 



313 



When the writer was at Cumberland recently, Mr Robert H. Gordon 

 pointed out to him the localities which furnished most of the Oriskany 

 fossils. At the " Devils Backbone," the Oriskany follows the Helder- 

 bergian, but before the fossils of the former formation appear there is 

 interpolated above what may be the Kingston, beds about 120 feet thick. 

 (See section on page 271.) In the short time devoted to collecting, no 

 fossils were seen, excepting at the base of the formation, where Anoplo- 

 theca flabellites, a true Oriskany fossil, was found. 



Cumberland, Maryland, has long been famous for its splendid Oris- 

 kany fossils, which are preserved as silicious pseudomorphs. These 

 were collected by Mr William Andrews, of Cumberland, and were sub- 

 mitted for description to Professor Hall. This enabled him to enlarge 

 considerably the Oriskany fauna described in 1859, in Paleontology of 

 New York, volume iii. Many of the Brachiopoda show not only the 

 interior structure of the valves, but also the processes for the support of 

 the brachia. The Gastropoda are also very well preserved, and are 

 found with other fossils in pockets of loose sand where the shells are 

 free, but usually with the finer surface structure destroyed. Hall writes 

 that "all of the specimens of the Crinoidea of the Oriskany sandstone 

 have been derived from the collection of Mr Andrews," of Cumberland. 



The following list contains the names of the species known to occur 

 in the Monterey formation about Cumberland, Maryland : 



be 



Sh 

 73 



K 





O 



hi 





t3 



Zaphrentis sp. undet. 28110 



Favosites conicus Hall 



" two additional species in the Gordon collection 



Homocrinus proboscidalis Hall 



Technocrinus andrewsi Hall 



" n. sp. (Gordon collection) 



" smlptus Hall. Founded on separated calyx plates. .. . 



" spinulosis Hall. 



" striatus Hall. Founded on separated calyx plates 



Edriocrinus saccuhis Hall. 10661. (In the Gordon collection there 



are fragments of at least 8 other species of crinoids) 



Anomalocystites dispari/ls Hall 



Pholidops arenaria Hall (= P. lerminalis) 



Chonostrophia complanata Hall. 28108 . . . . 



Orbiculoidea n. sp. (Gordon collection) 



' ' grandis Hall 



Orthis (Rhipidomclla) Cumberland! & Hall 



" " musculosa Hall. 8436, 10663 



XLV— Bull. Geol. Soc. Am., Vol. 11, 1899 



