Note 507 — Chapter XII · (continued 7)
Reading edition
F. M. Balfour, Monograph on the Development of Elasmobranch Fishes, p. 87, plate 9, fig. 2. [This edition, p. 303, pl. 10.]
Reading edition
F. M. Balfour, Monograph on the Development of Elasmobranch Fishes, p. 87, plate 9, fig. 2. [This edition, p. 303, pl. 10.]