Note 208 — Chapter XVIII · (continued 2)
Reading edition
Bobretzky first stated that the invagination remained open, but subsequently corrected himself. Zeit. f. Wiss. Zool., Bd. XXIV. p. 186.
Reading edition
Bobretzky first stated that the invagination remained open, but subsequently corrected himself. Zeit. f. Wiss. Zool., Bd. XXIV. p. 186.