Note 34 — Chapter I · HABITS OF WORMS.
Reading edition
‘Archives de Zoologie expérimentale,’ tom. vii. 1878, p. 394. When I wrote the above passage, I was not aware that Krukenberg (‘Untersuchungen a. d. physiol. Inst. d. Univ. Heidelberg,’ Bd. ii. p. 37, 1877) had previously investigated the digestive juice of Lumbricus. He states that it contains a peptic, and diastatic, as well as a tryptic ferment.