26 
Chronological List of North American Hadrosauridm 
Name as originally proposed, author, 
and date 
Formation and locality 
Nature of type or cotypes 
Trachodon mirabilis Leidy, 1856.. . . . 
Thespesius occidentalie Leidy, 1856.. 
Hadrosaurus foulkii Leidy, 1858 
Ornithotarsus immanus Cope, 1869. . . 
Pneumatoarthrus peloreus Cope, 1870 
Hadrosaurus minor Marsh, 1870 
Hadrosaurus tripos Cope, 1870 
Hadrosaurus cavatus Cope, 1871 
Hadrosaurus agilis Marsh, 1872 
Cionodon arctatus Cope, 1874 
Polygonax mortuarius Cope, 1874. . . . 
Cionodon stenopsis Cope, 1875 
Diclonius perangulatus Cope, 1876... 
Diclonius pentagonus Cope, 1876 
Diclonius calamarius Cope, 1876 
Dysganus encaustus Cope, 1876 
Dysganus bicarinatus Cope, 1876 
Dysganus haydenianus Cope, 1876 
Dysganus peiganus Cope, 1876 
Hadrosaurus breviceps Marsh, 1889. . 
Hadrosaurus paucidens Marsh, 1889.. 
Pteropelyx grallipes Cope, 1889 
Trachodon longiceps Marsh, 1890 
Claosaurus agilis Marsh, 1890 
Claorhynchus trihedrus Cope, 1892.... 
Claosaurus annectens Marsh, 1892 
Trachodon marginatus Lambe, 1902.. 
Trachodon selwyna Lambe, 1902 
Trachodon altidens Lambe, 1902 
Kritosaurus navajovim Brown, 1910 . 
Saurolophus osborni Brown, 1912. . . . 
Hypacrosaurus altispinus Brown, 
1913 
Gryposaurus notabilis Lambe, 1914.. 
Stephanosaurus marginatus Lambe, 
Judith River, Montana 
Lance, South Dakota 
Greensand, New Jersey 
tt tt 
tt tt 
U it 
Black Creek, North Carolina. 
Greensand, New Jersey 
Niobrara, Kansas 
Denver, Colorado 
Denver, Colorado. 
Two Medicine, Montana 
Judith River, Montana 
tl t( 
tt it 
it tt 
U tt 
tt it 
it tt 
it tt 
tt tt 
it U 
Lance, Wyoming 
Niobrara, Kansas 
?Judith River, Montana. 
Lance, Wyoming 
Belly River, Alberta — 
tt u 
tt it 
Kirtland, New Mexico 
Edmonton, Alberta 
» u 
Belly River, Alberta 
Teeth. 
Two caudal vertebrae and a 
first phalanx. 
Part of a skeleton. 
End of tibia, astragulus and 
fistula. 
Four sacral vertebrae. 
Dorsal and caudal vertebrae. 
Metatarsal, caudal vertebrae, 
humerus, and fragments. 
Caudal vertebrae. 
Part of skeleton. 
Right maxillary (part) with 
several teeth. 
Three dorsal vertebrae, frag- 
ments of limb bones. 
Maxillary with teeth. 
Detached teeth. 
Part of right maxillary with 
teeth. 
Left maxillary and other parts 
of skull. 
Part of a skeleton. 
Right dentary with teeth. 
Part of skeleton. 
Premaxillary and predentary. 
Nearly complete skeleton. 
Fore limb, etc. 
Fragment of dentary contain- 
ing teeth. 
Left maxilla with teeth. 
Skull. 
Skeleton. 
Part of skeleton. 
Skull and partial skeleton, 
fore limb, etc. 
1914 
Corythosaurus casuarius Brown, 1914 “ “ 
Prosaurolophus maximus Brown, 
1914 
Edmontosaurus regalis Lambe, 1917. Edmonton, Alberta. . 
Cheneosaurus tolmanensis Lambe, 
1917 “ “ 
Kritosaurus incurvimanus Parks, 
1920 Belly River, Alberta 
Parasaurolophus wallceri Parks, 1922. “ “ 
Corythosaurus excavatus Gilmore, 
Skull (referred). 
Skeleton. 
Skull. 
Partial skeleton. 
Skull and skeleton. 
Skeleton. 
Skeleton. 
1923 
Skull. 
Corythosaurus intermedius Parks, 
1923 
Lambeosaurus lambei Parks, 1923... . 
Skull. 
Skull. 
