Distribution.—Arctic, temperate, and tropical seas. Species of Acanthias, Læmargus, and Echinorhinus have occurred on our coasts.
Family 106.—RHINIDÆ (1 Genus, 1 Species.)
"Sharks with depressed flat body and large expanded pectoral fins."
Distribution.—Temperate and tropical seas, from Britain to California and Australia.
Family 107.—PRISTIOPHORIDÆ. (1 Genus, 4 Species.)
"Sharks with produced flat snout, armed with teeth on each edge."
Distribution.—Seas of Japan and Australia.
Sub-order Batoidei. (Rays.)
Family 108.—PRISTIDÆ. (1 Genus, 5 Species.)
"Rays with produced snout and lateral saw-like teeth."