Notes from Viktor Hamburger's lecture. Trinkaus continues his list from the previous page with information on the "4th Quartette--Endoderm" (includes two color diagrams). Trinkaus begins new section on "Metamorphosis of Trochophore into Adult"Lecturer: V. Hamburger, Lecture "Development of Annelida" (Information taken from the 1939 Embryology Course Book)Page 25 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