Alexander
Agassiz

Harvard (Chemistry Tree)


William Keith
Brooks

Johns Hopkins (DevTree)


Christian Ernst
Stahl

(Evolution Tree)


Oscar
Hertwig

(DevTree)


Ernst Heinrich
Haeckel

Universität Jena


Hans
Driesch

Universität Leipzig (DevTree)





Sheila J.
Counce

(Options)

Sheila CounceX