Henry Fairfield
Osborn

American Museum of Natural History (Evolution Tree)


Benjamin Arthur
Bensley

University of Toronto (Evolution Tree)




William John Knox
Harkness

University of Toronto


Donald Strathearn
Rawson

University of Saskatchewan


Raymond Robert
Langford

University of Toronto

Frank Harold
Rigler

McGill
(Options)


Paul A.
del Giorgio

University of Maryland (Chemistry Tree)

Frank RiglerX