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Notes from Hubert Goodrich's lecture. Final page of notes from June 20, 1939 lecture, including 'Diff. between two species of Fundulus". Start of notes from Hubert Goodrich's lecture on June 21, 1939, including 'Promorphology of the egg'
Notes from William Ballard's lecture. Trinkaus takes notes on reproduction in Coelenterates
Notes from Donald Costello's lecture. Trinkaus continues his notes on spiral cleavage and cell lineage with information about Crepidula and a cell lineage chart (cell phylogeny)
Notes from Viktor Hamburger's lecture. Trinkaus begins notes on "Development of the Annelidas" with a three-point list of features of "Annelida & Mollusca", then begins a list of features of "Hydroides (Eupomatus)"
Notes from Donald Costello's lecture. Trinkaus continues his notes on centrifugation of the egg with information on the effects of centrifugation on Asterias and Nereis (with diagram of "Centrifuged Nereis Egg")
Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the derivatives of the 2d cell, then makes a list of derivatives of the "4d cell", "From larva", and "Larval organs lost"
A headshot of John P. Trinkaus. Trinkaus is wearing a white shirt, dark tie, and glasses. He is looking at the camera.
John P. Trinkaus in the laboratory at the MBL. Trinkaus is seated in front of video equiptment, and is smiling at the camera.
John P. Trinkaus (left) standing next to Steve Zottoli (right) in their shared laboratory at the MBL
Notes from William Ballard's lecture. Trinkaus takes notes on the development after gastrulation in Podocoryne, Hydractinia, Medusae, and Tubularia
Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the Longfin short squid (Loligo pealeii) from page 44 and 45 with further notes on cleavage and the beginning of a new section on the "formation of shell gland"
Notes from O. Schotte's lecture. Trinkaus continues his list from the previous page with "Factors of Differentiation, Potencies" that includes information on transplantation in planaria (includes three diagrams) and notes on the works of Guyenot, Weiss and de Georgi