Photographs

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on the anatomy of Longfin shore squid (Loligo pealeii) from pages 44-47

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 Viktor Hamburger's lecture. Trinkaus takes notes on "Hans Spemann and Historical Background"

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on Hans Spemann and Historical Background from page 51 and 52 with a discussion of Spemann's work on the development of the lens

Notes from Viktor Hamburger's lecture. Trinkaus continues his notes on Hans Spemann and Historical Background from page 51-54 with a discussion of Spemann's work on the transplantation of the upper lip of the blastopore and his conclusion that induction is mediated by a chemical substance

Notes from Viktor Hamburger's lecture. Trinkaus takes notes on "The Squid Spermatophore" with 4 diagrams and information about reproduction in Cephalopoda and Chectocotylus

Notes from Viktor Hamburger's lecture. Trinkaus continues notes from page 57 and 58 on the copulation behavior of squid. He starts a new section on "Egg Laying"

Notes from Viktor Hamburger's lecture. Trinkaus begins notes on the "Formation of the Spermatophore" with a diagram and discussion of the "Process of Ejaculation" most likely in the squid

Notes from Oscar Schotte's lecture on "Echinoderm Embryology". Trinkaus takes notes on the phylogeny of echinoderms, and begins notes on echinoderm eggs.

Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the history of research on echinoderms, including information on Jacques Loeb, Hans Driesch, and Theodor Boveri. Trinkaus begins notes on the "Development of the Egg" with information on "inherent factor or potencies (Internal factors)"

Notes from Oscar Schotte's lecture. Trinkaus continues his notes on the echinoderm egg, with diagrams and discussion of Jenkinson (1911) study of sea urchin egg formation. Two diagrams show the egg attached to the wall of the ovary and the structure of the egg.