Notes from Hubert Goodrich's lecture. Trinkaus continues his notes on the origin of germ cells from page 22 and begins a new section on 'Hybridization'Lecturer: H.B. Goodrich, Lecture "Teleost Embryology. Special topics in Organogeny." (Information taken from the 1939 Embryology Course Book)Page 23 of 113 from the first 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, MA