Notes from Hubert Goodrich's lecture. Trinkaus continues his notes on the development of Mendelian characters from pages 29 and 30 with information on the "Conflict between cell mutliplication and cell division". Trinkaus takes notes on "Scale transplantation" in Slippery Dick (Halichoeres bivittatus) and includes a section on "Gordan's work"Lecturer: H.B. Goodrich, Lecture "Development of Color Patterns and of Mendelian characters in fish (Illustrated)." (Information taken from the 1939 Embryology Course Book)Page 31 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