1 8 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



The following lists have been carefully prepared to meet the wants 

 of those interested in the subject. All the fossils enumerated with 

 scarce an exception were gathered from this locality. With the filling 

 up of the quarries first worked and the gradual change in the rock 

 northward, with corresponding decrease of fossils, it is not very prob- 

 able that many of the rarer forms in the first list will again be met 

 with. Yet it is possible that on further examination some of these 

 may be found to have passed up into the Spirifer Pennatus beds, and 

 in such case should be inserted in the second list. 



I. — List of fossils characteristic of the Phragmoceras beds: 



Anlopora conferta Winchell. 



Heliophyllum coalitum Rominger. 



Alveolites minimus Davis. 



Cystiphylhim conifollis Hall. 



Pachypora fischeri Billings. 



Gypidula comis Hall. 



Pentamarella mint la Hall. 



Pentamarella arata Hall. 



Productella spinulicosta Hall. 



Spirifer subundiferus Meek «.\: Worthen. 



Rhynconella intermedia Harris. 



Newberria johannis Hall. 



Strophfldonta concava Hall. 



Megistocrinus nodosus Barris. 



Stereocrinus triangulatus Barris. 



Calceocrinus barrisi Worthen. 



Straparollus lativolvis Calvin. 



Gyroceras pratti Barris. 



Phragmoceras walshi Meek iv Worthen. 



Actinopteria decussata Hall. 



Conocardium cuneus Conrad. 



Paracyclas elliptica Hall. 



Paracyclas lirata Conrad. 



Proetiis prouti Shumard. 



2- — Fossils passing from the Phragmoceras into the Spirifer I'en- 

 natus beds : 



Astrceospongia hamiltonensis Meek \- Worthen. 



Acerimlaria davidsoni Hall. 



Crepidophyllum archiachi Billings. 



