Notes from William Ballard's lecture. Trinkaus completes his notes on T. Chow Tung from the previous page, and takes notes on Van der Broeck and Dalcq. Trinkaus starts a new section on "Asexual Reproduction" with an outline that begins with "1. Peribranchial or Atrial" (includes two diagrams)Lecturer: W. W. Ballard, Lecture "General Embryology of Tunicates" (Information taken from the 1939 Embryology Course Book)Page 66 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, MA