On the Judith River, Montana 117 



us by Brown. You will notice that we have two 

 names usually for these Belly River species. I 

 try to credit each student as best I may, leaving 

 it with future scientists to decide which name 

 should be retained in American Paleontology. 

 The Edmonton bone-beds, are very different, re- 

 sembling flotsam along the line of high tide, and 

 are all deposited in brackish water. These beds 

 like those in Dead Lodge Canyon, were laid 

 down in fresh water. There were very few tur- 

 tle shells in the Edmonton, here they strew every 

 exposure. Everywhere in this region were two 

 presistent layers of coal on top of the Judith 

 river followed by the Bear Paw Shales. Above 

 the upper vein of coal, is a layer of oyster shells 

 from a few inches to four feet thick. In the Bear 

 Paw shales south of camp a mile, Mr. Dowling 

 with the aid of a sheep herder, found a new 

 mosasaur, belonging evidently to the genus 

 Clidastes, as the chevrons were anchylosed 

 to the centra of the vertebrae, and the 

 tail was expanded into a fin. The man- 

 dibles with teeth, some fifteen feet of 

 the tail and many dorsal vertebrae were found. 

 We also secured some very beautiful ammonitL-s 

 and baculites and bones of the plesiosaur Cimo- 

 liasaurus. But for the uplift, the stratagraphi- 

 cal record is quite simple, the puzzling strata 

 tipped in all directions were easily identified un- 

 der direction of the skilled observer Mr. Dowl- 

 ing. It would be impossible for any one on the 



