Northern Peninsula of Michigan. 61 



The following species of fossils were collected from the 

 Hendricks dolomite and Fiborn limestone at the Hend- 

 ricks quarry. 



Fossils from the Hendricks dolomite at Hendricks 

 quarry : 



J Zaphrentis sp. 

 Stratum J\o. H j Camarotcechia? winiskensis Whiteaves 



( Atrypa putilla (Hall and Clarke) 

 j Camarotcechia? winiskensis Whiteaves 

 Stratum No. 1J i Cyclonema cf. daytonensis Foerste 

 Illcenus sp. 



Atrypa putilla (Hall and Clarke) 

 Camarotcechia? winiskensis Whiteaves 

 Stratum No. 20 ■{ Spirifer sp. 



Leperditia hisingeri var. fabxdina Jones 

 Illcenus sp. 



The Fiborn limestone in the upper part of the quarry 

 furnished the following species : 



Actinostroma cf. tenuifilatum Parks 



Favosites forbesi var. 



Zaphrentis cf. stokesi Edwards and Haime 



Atrypa putilla (Hall and Clarke) 



Camarotcechia? winiskensis Whiteaves 



Orthis flabellites Foerste 



Plectambonites cf. transversalis var. 



Schuchertella cf. propinqua (Meek and Worthen) 



Spirifer sp. 



Isochilina grandis var. latimarginata (Jones) 



Leperditia hisingeri var. fabulina Jones 



The presence of Camarotoechiaf winiskensis as a com- 

 mon fossil in these strata is somewhat surprising and 

 very significant, for it is a northern species not previ- 

 ously recognized in the United States. 



The ostracods Leperditia hisingeri var. fabulina, and 

 Isochilina grandis var. latimarginata are also species that 

 have been described from the Saskatchewan region. 

 Schuchertella propinqua occurs in the Edgewood forma- 

 tion in Illinois, and Atrypa putilla is a good guide fossil 

 of the Edgewood. Plectambonites transversalis var., 

 Orthis flabellites and Spirifer sp. are not inconsistent 

 with the reference of these rocks to the Edgewood forma- 



