12 Bulletin 12 140 



Rockford fossils — 



Coelenterata: Sphenopterhiin enorme M. and W. (Winchell) 

 (Meek and Worthen); Zaphrentis ida Win., (Winchell). 



Echinodermata: Synbathocrinus owe7ti 'KzW, (Hall). > 



Brachiopoda: Athyris biloba Win., {Spirigera biloba) (Winch- 

 ell); Chonetes geniculata White, (Winchell); Chonetes illinoiseiisis 

 Worthen, (Schuchert); Chonetes illinoisensis VJorth&n, (Winch- 

 ell); Produ£ltis concentricusl^2\\, (Winchell); Reticularia cooperen- 

 sis Hall, {Spirifer semiplicatus) (Hall), (Meek and Worthen); 

 Rliipidomella occasus Hall, {Orthis occasics) (Hall); Rhyncho7iella 

 missouriensis Shum., (Meek and Worthen); Rhynchonella obso- 

 lescens Hall, (Hall); Rhynchonella f tetraptyx Win., (Winchell). 



Pelecypoda: Anatina leda Hall, (Hall); Aviculopeden tenui- 

 costus Win., (Winchell); Cardiomorpha radiata M. and W., 

 (Meek and Worthen); Cypricardia ventricosa Hall, (Hall); Meg- 

 aynbonia lyoni Hall , (Hall); Ntiaila hians Hall (Hall). 



Gastropoda: Bellerophon cyrtolites Hall, (Hall); Bellerophon 

 lineolatus Hall, (Hall); Euornphalus lens Hall, (Hall); Euom- 

 phalus spirorbis Hall, (Hall); Loxonema turritiforme Hall, 

 (Hall); Murchisonia {Pleurotomai-ia ?) limitaris Hall, (Hall); 

 Pleurotomaria f niitigata Hall, (Hall); Pleurotomaria vadosa 

 Hall, (Hall); Pugiuyiculus f {Theca) aculealus Hall, (Hall). 



Cephalopoda: Goniatites ixion Hall, (Hall); Goniatites lyorii 

 Meek and Worthen, (Meek and Worthen); Gyroceras gracile 

 Hall, (Hall); Nautilus {Discus) digonus -M. and W., 

 (Meek and Worthen); Nautilus {Discus) trisulcatus M. 

 and W. , (Meek and Worthen); Nautilus rockfordensis Win., 

 (Winchell); Nautihis {Treniodiscus) discoidalisf Win., (Winch- 

 ell); Orthoceras icarus Beecher, (Beecher); Orthoceras indianen- 

 «V Beecher, (Beecher); Orthoceras marcellensis (Vanuxem) (Jas. 

 Hall). 



Trilobitse: Phillip sia doris (Hall) Win., (Hall) (Winchell; 

 Phillipsia rockfordensis Win., (Winchell). 



Pisces: Otodus viulticarinatus Nor. and W. , (Norwood and 

 Worthen. ) 



The Black shale outcrops on the east bank of White river two 

 miles above Rockford, exposing a thickness of ten or twelve feet. 

 A half day's digging at this point failed to discover any fossils. 



