. A guide to the study of fishes. Fishes; Zoology; Fishes. Fig. 7.—Lake Sturgeon, Acipenser nibicundus Le Sueur. Ecorse, llich. In the genus Acipenser the snout is sharp and conical, and the shark-like spiracle is still retained. The shovel-nosed sturgeon {Scaphirhynchus platyrhynchus) has lost the spiracles, the tail is more slender, its surface wholly bony, and the snout is broad and shaped like a shovel. The single species of Scaphirhynchus abounds in the Mississippi. Fig. 8.—Shovel-nosed Sturgeon. Scaphirhynchus platyrhynchus (Rafinesque). Ohio River. Valley, a fish more interesting to the
. A guide to the study of fishes. Fishes; Zoology; Fishes. Fig. 7.—Lake Sturgeon, Acipenser nibicundus Le Sueur. Ecorse, llich. In the genus Acipenser the snout is sharp and conical, and the shark-like spiracle is still retained. The shovel-nosed sturgeon {Scaphirhynchus platyrhynchus) has lost the spiracles, the tail is more slender, its surface wholly bony, and the snout is broad and shaped like a shovel. The single species of Scaphirhynchus abounds in the Mississippi. Fig. 8.—Shovel-nosed Sturgeon. Scaphirhynchus platyrhynchus (Rafinesque). Ohio River. Valley, a fish more interesting to the naturalist than to the fisherman. It is the smallest of our sturgeons, often taken in the nets in large numbers. In Scaphyrhynchus the tail is covered by a continuous coat of mail. In Kessleria * fedtschenkoi, rossikowi, and other Asiatic species the tail is not mailed. Order Selachostomi: the Paddle-fishes. — Another type of Ganoids, allied to the sturgeons, perhaps still further degenerate, is that of the paddle-fishes, called by Cope Selachostomi {aeXaxos, shark; a-tofxa, mouth). This group consists of a single family, PolyodontidcB, having apparently- little in common with the other Ganoids, and in appearance still more suggestive of the sharks. The common name of paddle-fishes is derived from the long flat blade-in which the snout terminates. This ex- tends far beyond the mouth, is more or less sensitive, and is * These species have also been named Pseudoscaphirhynchus. Kessleria is the earlier name, left undefined by its describer, although the type was Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Jordan, David Starr, 1851-1931. New York, H. Holt
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