In the 1870s , the famous American paleontologist Edward Drinker Cope discovered another , more complete set of fossils in North America , and named them Diatryma . In the 1870s , the famous American paleontologist Edward Drinker Cope discovered another , more complete set of fossils in North America , and named them Diatryma ( , from Ancient Greek Î Î Î Ï Ï Î Î 1\/4 Î , diatrema , meaning `` canoe '' ) .