Note 421 — Chapter XXI · PYCNOGONIDA[393]
Reading edition
Loeb (Arch. Entw. Mech. v. 2, 1897, p. 250) also says that the Pycnogons are positively heliotropic.
Reading edition
Loeb (Arch. Entw. Mech. v. 2, 1897, p. 250) also says that the Pycnogons are positively heliotropic.