Notes from Viktor Hamburger's lecture. Trinkaus begins notes on the "Embryology of the Trochophore" with two color diagrams and notes on gastrulation, then begins a section on "Derivatives of Trochophore"Lecturer: V. Hamburger, Lecture "Development of Annelida" (Information taken from the 1939 Embryology Course Book)Page 22 of 72 from the second notebook of lecture and laboratory notes that John P. Trinkaus took during his time as a student in the Marine Biological Laboratory Embryology Course in 1939 in Woods Hole, MAColor diagrams