John P Trinkaus' MBL Embryology Course Notes, Notebook I, 1939. Page 74

Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the echinoderm egg notes about the position of the first cleavage relative to the axis of the embryo. He offers results of various researcher's studies and concludes that "Vital staining method shows therefore that there is no coincidence of the 1st cleavage with the axis of the embryo"Lecturer: O. Schotte, Lecture "Development of the Echinoderm egg according to Horstadius" (Information taken from the 1939 Embryology Course Book)Page 74 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, MANote