John P Trinkaus' MBL Embryology Course Notes, Notebook I, 1939. Page 73

Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the echinoderm egg with information about the position of first cleavage relative to the axis of the embryo, with four diagramsLecturer: O. Schotte, Lecture "Development of the Echinoderm egg according to Horstadius" (Information taken from the 1939 Embryology Course Book)Page 73 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