Geological Purvey of the State of Ohio. 



363 



A. Lower jaw of the Elephant found 

 at Jackson. 



B. Lower jaw of the fossil 

 Elephant. 



I have not had an opportunity of comparing the teeth of this 

 elephant with those of the E. primogetieus. They resemble 

 some of those figured by Parkinson. I will give you a drawing 

 of one of the plates of the E. Jacksoni. (I will so call it for the 

 sake of brevity. ) This drawing is rather 

 too wide, in proportion to the length. 

 Thus you will see that there are seven 

 lines running obliquely, seven distinct 

 ribands, and five which do not extend across the tooth. The 

 other teeth differ from this, having more ribands which extend 

 across the tooth, and only two which are broken. From these 

 differences, we think that it cannot belong to the E . primogeneus 

 of Guvier, and yet we are not prepared to say that it is identical 

 with the E. recens. 



I agree with you, that some other designation besides Waverly 

 ought to be applied to the fine-grained sandstone. We ought to 

 exclude all local names. And yet the term " upper secondary" 

 is objectionable, since this rock underlies all the coal, and is sepa- 

 rated from the carboniferous limestone only by a bed of shale, 

 three hundred feet thick. The term Waverly is used to designate 

 a peculiar member of the secondary rocks, a particular stratum 

 which I have never seen elsewhere. It is composed of commi- 

 nuted sand, and yet it adheres so closely as to form the best build- 

 ing material we have in the State. It is a rock sui generis. 



Dr. Hildreth, I suspect, must have arrived at the conclusion 

 that the new red sandstone was found in Ohio, merely from the 

 lithological characters of some of the rocks. The sandstones 

 are occasionally tinged red, but this is local. For example, the 

 conglomerate, beneath all the coal, sometimes assumes this ap- 

 pearance, and the Doctor was disposed to call it the new red sand- 



