(1):

(n.) The common sand shark. See under Snad.

(2):

(n.) A small California shark (Heptranchias maculatus), which is taken for its oil.

(3):

(n.) A Pacific Ocean shark (Hexanchus corinus).

(4):

(n.) A ganoid fish of the Sturgeon family (Scaphirhynchus platyrhynchus) of the Mississippi and Ohio rivers; - called also white sturgeon.