26 DAVENPORT ACADEMY OF NATURAL SCIENCES. 



Aulopora serpens Goldfuss. 



Chonetes scitula Hall. 



Coenostroma pustuliferutn Winchell. 



Crania crenistria Hall. 



Crania hamiltoniae Hall. 



Cystiphylliim americanum Edwards & Haime. 



Crepidophyllum archiachi Billings. 



Cfjpfofiella planirostra Hall. 



Cyrtina hamiltonensis Hall. 



Cyrtina triquetra Hall. 



Favosites hamiltonensis Rominger. 



Megistocrinus latus Hall. 



Monticulipora monticula White. 



Orthis iowensis Hall. 



Phacops rana Green. 



Platyceras ventricosum Conrad. 



Platyostoma lineatum Conrad. 



Productella spinulicosta Hall. 



Productella subalata Hall. 



Spirifer asper Hall. 



Spirifer pennaius Hall. 



Spirifer per extensus Meek & Worthen. 



Spirifer subattenuatus Hall. 



Striatopora iowensis '.Owen. 



Stropheodonta demissa Conrad. 



Stropheodonta nacrea* Hall. 



Stropheodonta perplana^ Conrad. 



Stropheodonta plicata Hall. 



Strophomena chemungensis\ Conrad. 



Var. arctostriata Hall. 



Terebratula lincklaeni Hall. 



2. — A list of the rarer forms: 



Aulacophylluni sulcatum Edwards & Haime. 



Ariculopecten princeps Conrad. 



* Pholidostrophia nacrea. Eleventh Annual Report of N.Y. State Geologist, page 281, 

 plate 14, figs. 11-13. 



\ Leptostrophia perplana. Eleventh Annual Report of New York Stale Geologist, page 

 281, plate 15, figs. 1-4. 



X Oythothetes chemungensis. Eleventh Annual Report of New York State Geologist, page 

 284, plate i5, fig. g. 



Orthothetes arctostriata. Thirteenth Annual Report of N. Y. State Geologist, Vol. I., Ge- 

 ology, page 134, et seq. 



