TABLE OF CONTENTS. 



Introductory remarks . 



I. SILURIAN AGE. POTSDAM PERIOD. 



PAOI 



MOLLUSCA 1 



Class BKACHIOPODA .... 1 



Family LINCIULID.S .... 1 



Genus LINOULEPIB .... 1 



Lingulepis pinuiformis . . 2 



prima ... 3 



Genus OBOLELLA .... 3 



Obolclla nana ... 4 



Class GASTEROPODA .... 4 



Subclass Pteropoda .... 4 



Order THECOSMATA . . 4 



Family CAVOLINID.S ... 4 



Genus THKCA . 



Theca gregaria 



ARTICULATA .... 



Class CKU8TACEA . 



Subclass ENTOMOSTKACA 

 Order TRILOBITA . 

 Family I'AKAIH .\ MM: . 

 Gcuus AORAULOS 

 Agranlos 

 Agranlos Oweni 



II. CARBONIFEROUS AGE. CARBONIFEROUS PERIOD. 



PROTOZOA 11 



Class RmzopODA 11 



Order FOKAMIMFERA . . . .11 



Family CAMKIUMIU: . . .11 



Genus FUBULINA ... 13 



Fusulina cylindrica . . 14 



MOLLCBCA 16 



Class BRACITIOPODA . . . .16 



Family SPIRIFERID.S .... 16 



Genus SriRimi . . . .17 



Snbgenns SPIRTFER ... 19 



Subgenus TRIOONOTRBTA . . 19 



Subgeuus MARTINI A . . .19 



Spirifer planoconvexus . 20 



Family PRODUCTIONS . . . .21 



Genus CIIONETES .... 22 



Chonetes mncronata . . 22 



Family STROPIIOMKNID^B ... 23 



Genus HEMIPRONITES ... 24 



Hcmipronites crassus . . 26 



Class LAMELLJBRANCHIATA ... 27 



Family PTERIID.S =(AVICULIDJB) . 27 



Subfamily PTKRIMI.S ... 28 



Geuns .M VAI.I.N A . 30 



Til 



PAO 



5 



5 



7 

 7 

 7 

 7 

 7 

 7 

 7 

 9 

 10 



Myalina pcrattennata . 32 



subqnadrata . 32 



Subfamily PTERIIN.S ... 28 



, Subfamily MELINIKA ... 28 



Family CRABSATELLIU^ ... 34 



Genus PLEUROPUORUS ... 34 



Plenrophorus occidcntalis . 35 



Family ANATINHXS .... 36 



Genus ALLORISMA .... 36 



Allorisma snbcnneata . . 37 



Genus SEDOWICKIA ... 38 



Sedgwickia topckaensis . . 40 



? concava . . 41 



? altirostrata . . 41 



Genus Chtcnomya . . . .42 



Cluunomya leavenworthensis . 43 



Cooper! . . 44 



Class GASTEROPODA .... 44 



Subclass PROSOBRANCHIATA . . 44 



Order RIPUIDOQLOSSATA . . 44 



Suborder PODOPTHALMA . . 44 



Family PLECRoroMARriD.fi . 44 



Genus PLEUROTOMARIA . 45 



Pleurotomaria humerosa 46 



subturbinata 47 



