Fig. 3.
a. Scales of Acanthodes sulcatus.
b. Shagreen of Scyllium stellare, (Snout.)
(Mag. eight diameters.)
Fig. 4.
a. Scales of Cheiracanthus microlepidotus.
b. Shagreen of Spinax Acanthias. (Snout.)
(Mag. eight diameters.)
Fig. 3.
a. Scales of Acanthodes sulcatus.
b. Shagreen of Scyllium stellare, (Snout.)
(Mag. eight diameters.)
Fig. 4.
a. Scales of Cheiracanthus microlepidotus.
b. Shagreen of Spinax Acanthias. (Snout.)
(Mag. eight diameters.)