OF DENISON UNIVERSIIY 



27 



In our study all collections made before the discrimination of 

 these various horizons were abandoned and the whole recollected, la- 

 beling each fossil with its relative position with reference to the base 

 line. The typical exposure o( the county is that formed by the ero- 

 sion of Raccoon creek, near what is known as ihe *' Dug-way," be- 

 tween Granville and Newark. It is supplemented by that one mile 

 south of Newark and one mile north of the same place. Exposures 

 six miles further east corroborate the observed sequence. The lower 

 layers can be best studied at Moot's run, four miles west of Granville. 



The most significant determinative fossils are Allorisma winchelli, 

 of the shale below congl. II; Spirifer winchelli, of congl. II ; Sjjirifer 

 cuspidatus, of division II; Palaeoneilo attenuata, of shales below congl. 

 I ; Leiopteria ortoni of the 40 ft. layer below : Spiriler marionensis, 

 of still lower horizons. The discussion of the stratigraphical relations 

 of the various species is omitted and the reader is referred to the dis- 

 tributional table at the close. 



Outside of Licking county considerable work has been done which 

 is here only so far employed as to verify the observed relations. It is 

 reserved for another occasion when a wider range of comparison may 

 be admissible. 



LIST OF FOSSILS FROM LICKING COUMV, olilO. 



This list has been compiled under almost disheartening difficulties 

 and is merely a prehminary contribution to the fauna of the group. 

 Certain suhkingdoms have not been studied at all and as the plates 

 were engraved prior to the elaboration of some ftmiilies typical forms 

 have not always been figured. The collection of additioml specimens 

 may affect determinations here made, but it is not believeil that further 

 study will materially alter the relative value of the chronological evi- 

 dence. I wish here to express obligations to Prof. Alexander Win- 

 chell, the renowned geologist of Michigan, for indisijensible assistance. 

 A small suite of specimens and i)art of the plates were placed in his 

 hands, which he kindly examined and reported upon, thus preventing 

 serious mistakes. However, it is but just to say that the nature of the 

 material sent was such that, even where his views are (juoted, it would 

 be unfair to implicate him in the mistakes contained in this paper for 

 which the writer assumes full responsility, at the same time a( knowl- 

 edging himself indebted very largely for whatever value the i^apcr 



