CHAP. XX.] 
FISHES. 
459 
Family 95. — LEPIDOSTEIDiE. (1 Genus, 3 Species.) 
w Fresh-water fishes, with ganoid scales, and dorsal and anal 
fins composed of articulated rays.” 
Distribution; — The genus Zepidosteus , the Garfishes or Bony 
Pikes, inhabits North America to Mexico and Cuba. 
Order II.—OHONDBOSTEI. 
“ Sub-cartilaginous scaleless fishes with heterocercal tail, the 
skin with osseous bucklers or naked.” 
Family 9 6 . — ACCIPENSEKID AS. (2 Genera, 20 Species.) 
“ Marine or fresh- water fishes with osseous bucklers and inferior 
mouth.” 
Distribution.— Temperate and Arctic regions of the northern 
hemisphere. Accipenser (19 sp.), comprising the Sturgeons, has 
the distribution of the family ; most of the species are marine, 
but some are confined to the Caspian and Black Seas and the 
great American lakes with the rivers flowing into them, while 
the Danube, Mississippi, and Columbia Kiver have peculiar 
species. The other genus, Scaphirhynchus (1 sp.), is confined to 
the Mississippi and its tributaries. 
Family 97.— POLYDONTIDAS. (1 Genus, 2 Species.) 
“ Fresh-water fishes, with wide lateral mouth and naked 
skin.” 
Distribution. — The Mississippi and Yang-tse-kiang rivers. 
