2 Dicotyles (Platygo^ms) compressus, Le Conte. 



solved ; and kept at the boiling point for the space of one hour after 

 ^he bones were immersed. Nearly all the bones treated in this man- 

 ner were restored to a comparatively great degree of firmness and 

 solidity; more especially such ones as wei'e fractured, or in which the 

 internal structure was exposed. But this process — the only one with 

 which I am acquainted for the purpose of restoring the gelatine to the 

 bones — has its disadvantages. I found that nearly all the " bases " and 

 "heads'' of femurs, humeri, ulnte, and other bones, separated from 

 the shafts ; and it was by no means an easy process to replace and 

 unite them again. 



Before proceeding to give a detailed description of the bones, it is, 

 perhaps, not inappropriate to describe the geological formation of the 

 locality in which they were found. From the northern boundary of 

 Delaware county, until near its junction with the Scioto river, within 

 the city limits of Columbus — a distance of about thirty-five (35) miles— 

 the Olentangy, flowing nearly due south, flows on the outcrop of the 

 Huron shales ; the left bank being the shale outcrop, and often some- 

 what precipitous. In this shale bank or outcrop, septaria abound : 

 the extremes in size of these septaria range from two inches in diame- 

 ter, or perhaps even less, to more than ten (10) feet in diameter ; 

 those from one to two feet in diameter being the most abundant. The 

 right bank of the Olentangy is of "valley drift," and beyond it, 

 westward, for many miles, the surface of the country is very level. 



About eight miles west of the Olentangy, on the north boundary 

 of Delaware county, is the Scioto river, which flows a little to the 

 east of south, so as to unite with the Olentangy in the city of Colum- 

 bus. The Scioto, however, flows over a bed of corniferous limestone. 

 The valley between these two streams, as well as the country for miles 

 east and west of it, is covered with a deep drift. When boring the 

 artesian well in the State House yard, this drift was found to be one 

 hundred and twenty-three feet thick at that point. But the drift on 

 which the State House and the city in its immediate vicinity are built, 

 differs very materially from that in which the remains or bones were 

 found. The one hundred and twenty-three feet of material deposited 

 on the fifteen feet of shale, which intervenes between it and the cor- 

 niferous rock, is material undoubtedly due to the action of glaciers 

 and icebergs. From a record kept at the time of boring the artesian 

 well above mentioned, the augur passed through the following thirteen 

 strata : 



