. Synopsis of the fishes of North America [microform]. Fishes; Poissons. 0m i''t'>i; (liii irmffliiiii CONTEIBUTIONS TO NORTH AMERICAN ICHTnYOLOGYâIV. 4§.â8CAPinRBHiriVâ¬HOPS GilL 8hovel-no86 Sturgeons. ,â :. ⢠(Scaphirhynchua Heckel, Ann. WienerMus. Naturgesch. i, 1835,71; preoccupied in oruf. thology.) {Scaphirhynchops* (Gill, MSS.) Jordan & Copeland, Ball. Buff. Sec. Nat. Hist. 1876,161; type Acipenser platorynchus Kafinesque.) Snout broad, depressed, subspatulate or shovel-shaped. No spiracle. Caudal peduucle very long, strongly depressed, broader than deep. Rows of bony bucklers
. Synopsis of the fishes of North America [microform]. Fishes; Poissons. 0m i''t'>i; (liii irmffliiiii CONTEIBUTIONS TO NORTH AMERICAN ICHTnYOLOGYâIV. 4§.â8CAPinRBHiriVâ¬HOPS GilL 8hovel-no86 Sturgeons. ,â :. ⢠(Scaphirhynchua Heckel, Ann. WienerMus. Naturgesch. i, 1835,71; preoccupied in oruf. thology.) {Scaphirhynchops* (Gill, MSS.) Jordan & Copeland, Ball. Buff. Sec. Nat. Hist. 1876,161; type Acipenser platorynchus Kafinesque.) Snout broad, depressed, subspatulate or shovel-shaped. No spiracle. Caudal peduucle very long, strongly depressed, broader than deep. Rows of bony bucklers confluent below the dorsal fin, forming a com- plete coat of mail on the tail. Tail produced in a filament beyond the caudal fin. Gill-rakers somewhat fan-shaped. PseudobranchisB obso- lete. Species about 4, inhabiting the fresh waters of the United States and Central and Eastern Asia, {ffxd^rj, spade; ^oyx'K, snout; wi/', appear- ance.) 79. S. platyrrhyocllUS (Kafinesque) Gill.âShovel-nosed Sliiryeon; White Sturgeon. Body elongate, tapering into a slender, depressed tail, which extends beyond the caudal fin in the form of p. filament. This filament is long and slender in the young, but is frequently lost in the adult. Bony shields opisthocentrous, sharply keeled, the series confluent below tlie dorsal, obliterating the smaller plates between. Two occipital plates with short keels. A spine in front of eye, and one at the posterior edge of the rostral " shovel"; snout in the young with a few spines. Barbels nearer mouth than tip of snout. Greatest width of head about half its length. None of the fulcra enlarged. Dorsal and anal small. Anal partly below dorsal. Gill-rakers small, lamellate, somewhat fim-shaped, ending in 3-4 jjoints. Dorsal shields 15-18; lateral 41-40; ventral 11- 13. Head 4 in length. L. 5 feet. Mississippi Valley and streams of the Western and Southern States; common. (AclpeHHerplatorhynchus Rafinesquo, Iclith. Oh. 1820, 80: Scaphirhynchua
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectfishes, bookyear1882
