36 AUG. F. FOERSTE 



sils,' and the section there is considerable.^ The Lorraine at 

 Clifton consists of gray or bluish-gray, coarse-grained limestone 

 which may be readily distinguished from the Richmond lime- 

 stone immediately above by the presence of considerable chert. 

 It is very fossiliferous, but the fossils must be broken out of the 

 rock and do not form good cabinet specimens. 



The most common and at the same time most characteristic 

 fossil is Dinorthisretrorsa. In Ohio and Indiana this fossil has a. 

 very limited vertical range, being confined to a bed, rarely exceed- 

 ing one or two feet in thickness, near the top of the Lorraine.. 

 This bed is included in the subdivision to which Mr. Nickles gave 

 the name "Warren bed." The Lorraine bed at Clifton, here 

 described, is therefore identified as the Warren limestone. 



Another rather abundant species is a form of Rhyjichotrema 

 dentatum which differs from that found in the Richmond in the 

 possession of three distinct plications and one indistinct plication 

 on either side of the dorsal fold instead of four distinct and one 

 or two indistinct plications, as in the Richmond group. In con- 

 sequence, the plications appear more angular. This form occurs 

 also at the top of the Lorraine half a mile southwest of Howards- 

 mill, in Montgomery county, Ky. 



LeptcE?ia rhomboidalis is fairly common. This species occurs 

 associated with Dinorthis retrorsa also at the base of the Morris 

 Hill section, in the hollow directly west of the mouth of Caesar's 

 creek, in Warren county, O. 



A Dalmanella, belonging to the group of D. testuditiaria, is 

 very common. The dorsal valve is flat and has a distinct mesial 

 depression, extending from the beak to the anterior margin.. 

 The plications bifurcate two or three times. It resembles most 

 the form identified in Indiana and Ohio as Dabnanellajugosa'^, and 

 differs chiefly in having a flat dorsal valve and coarser plications.. 

 The typical forms of Dalmanella jugosa, on the contrary, have a 

 moderately convex dorsal valve. Both forms are common at the 



^ The Geology of Cincinnati, p. 74. 



^ Safford, The Geology of Tennessee, p. 265. 



3HARPER AND Bassler, 1896, Catalogue of Fossils of Cincifinati,^). 16 ; NiCKLES,. 

 1902, Geology of Cincinnati, p. 92. 



