SUCCESSIVE DEPOSITS IN THE APPALACHIAN REGION 419 



In the ravine below Cowan Gap, a blue fossiliferous calcareous sandstone 

 is exposed weathering into "a soft, porous yellow, fine-grained mudstone." 

 This is regarded by Stose as probably higher in the series than the pre- 

 ceding. It has furnished, besides numbers 3, 4, and 5 of the above list, 

 the following species ( Stose, loc. cit. ) : 



6. Callopora sigillaroidea 



7. Plectambonites sericeus (large variety) 



8. Zygospira modesta var. 



9. Orthoceras transversum ? 

 10. Trinucleus concentricus ? 



In coarse, brown sandstone near the top of the formation besides large 

 Plectambonites (probably number 7) the following were found: 



. 11. Rafinesquina squamula 



12. Zygospira modesta 



Finally, in massive mottled, yellowish green sandstone, merging into the 

 overlying Juniata formation, Stose found poorly preserved specimens of : 



13. Rafinesquina alternata 



Analyzing the above meager faunas, we note that Plectambonites sericeus 

 ranges from the Stones Eiver to the Maquoketa in the Upper Mississippi 

 Valley, from the Stones River to the Richmond in the Cincinnati region, 

 and from the Trenton through the Lorraine in New York. The barnacle 

 Lepidocoleus jamesi has been found in the Upper Trenton beds of the 

 Cincinnati region and ranges through the Eden and through the Mays- 

 ville. In New York it ranges from the Trenton to the Lorraine. Calym- 

 mene calliceplialus, a form characterizing the lower sandstone beds, 

 ranges from the Trenton to the Richmond in the Cincinnati and Upper 

 Mississippi regions, and from the Trenton to the Lorraine in New York 

 and Canada. DalmaneUa multisecta was originally described from the 

 lower 200 feet of the Cincinnati beds at Cincinnati, where it is abundant. 

 These represent the Eden horizon of the Cincinnati group, hut the species 

 is also found in great abundance in the Mount Hope or Lower Maysville 

 beds of that region. It is also found, though rarely, in the Maquoketa 

 shales of Iowa. 28 The Bryozoan Callopora sigillaroidea (Ulrich) (= (\ 

 onealli var. sigillaroides (Nicholson), according to Bassler) occurs in the 

 Eden beds of the Cincinnati region. I have not found it recorded from 

 higher horizons. Orthoceras transversum and Trinucleus concentricus 

 are doubtfully identified. The (irst of these was originally described 



88 Sardeson's bed 12. American Geologist, vol, xix, 1897, i». '-'T. 



