Dogfish
the name given to any species of the genus Scylium, the type of the family Scylliidæ. Dogfish are like small sharks. They are, moreover, oviparous. Of the known species, which are about 11, the small-spotted dogfish, the large-spotted dogfish, and the blackmouthed dogfish are the best known The egg cases are curious bodies, like purses. They are popularly known as mermaid's purses, sea purses, etc.
DOGMATICS