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Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the Longfin short squid (Loligo pealeii) from page 44, with information covering egg-laying, fertilization, and cleavage. Diagrams of sperm penetration and polar bodies are included
Front cover of the John P. Trinkaus autobiography, "Embryologist"
Notes from Eliot Clark's lecture. Trinkaus begins his notes with information on "Microscopic observation of certain embryological Processes in the living adult mammal." concerning the circulatory system
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 Oscar Schotte's lecture. Trinkaus continues notes from page 86 on the metamorphosis of echinoderms with five more diagrams (labeled 3-7).
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
Notes from Viktor Hamburger's lecture. Trinkaus concludes his notes for this lecture with a final line about the metamorphosis of the trochophore
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 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 continues his notes on the metamorphosis of the trochophore with a diagram and information about how it changes during development
Notes from Donald Costello's lecture. Trinkaus continues his notes on spiral cleavage with information about Nereis and Crepidula (includes three cell lineage diagrams)

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