-MAMMOTH BONES DISCOVERKD IN AVASHINGTOX CO., IOWA. 177 



Bones of the Maiuiiioth in Washing-ton Co., Iowa. 



BY .1. GASS AND W. H. PRATT. 



Having- observed some newspaper notices of large bones and teeth 

 found in Washington County, Iowa, by Mr. Jerry Hoppin, we went 

 down there on the eighteenth of July last to see what discoveries had 

 been made. 



We found Mr. Hoppin's farm on Section 14, Township '-i'^, Hange 

 o, and made a careful examination of the objects and the locality 

 whei-e they were discovered. 



The remains consisted of the following teeth and bones of KUphxix 

 pr'niiliiinliix^ — vi/ : 



The two upper moUirs — beautiful specimens, very well preserved 

 and nearly black. The grinding surface on each is eleven by four 

 and three-fourths inches; and the greatest depth of the tooth, nine 

 and one-half inches. To each of these teeth is still attached a por- 

 tion of the jaw-bone, showing also a part of the socket of the tusk. 



A fragment of a tusk, thirty inches in length and twenty-one inch- 

 es in circvnnference. It is very nnich decomposed and falls to pieces 

 rapidly. A considerable c|uantitv of finely broken fragments was al- 

 so found. 



The atlas, absolutely perfect. The extreme width of this bone is 

 seventeen and one half inches; its antero-posterior diameter, nine 

 inches; aiticulating surface, ten by four and one-half inches. 



Three other well-preserved vertebra^; one cervical, one lumbar, 

 one uncertain; having an articulating surface of six and one-half 

 inches diameter. 



The left scapula, from which a i)ortion is broken off. Its extreme 

 length is thirty-four inches; greatest width of part preserved, twenty 

 inches; articulating surface, nine and one-half by six inches. 



One segment of the sternum, very perfect. Its dimensions are, 

 length, eleven inches; depth, six and one-half inches; and width, 

 four and one-half inches. 



Head of femur, of hemispherical form, seven and one-half inches 

 in diameter. 



A portion of humerus thirty-six inches long, both extremities want- 

 ing, and the whole much decayed and very fragile. 



One tibxila, quite perfect, twenty-seven and one-half inches long. 



Several fragments of ribs, one piece three feet in length, and some 



fProc. D. A. N. S., Vol. III.] 3;J [May 27, 1883.] 



