Note 92 — Chapter VII
Reading edition
Bütschli for Pilidium regards these pits as formed by invaginations of the epiblast, but Metschnikoff’s statements are in accordance with those in the text.
Reading edition
Bütschli for Pilidium regards these pits as formed by invaginations of the epiblast, but Metschnikoff’s statements are in accordance with those in the text.