. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. Figr. 47—.The Paddle Fish Polyodon, spatula. (U. S. F. C.) A- of the Mississippi, the latter the ordinary Sturgeon of our Lakes {Acipenser rubicundus) (Fig. 48) and the Shovel-nosed. —The Lake Sturfreon. Aeijmiser rubicundus. ^. (U. S. F. C.) Sturgeon of the Western and Southern States (Scaphirrhyn- chops). In all of these forms the skull is a cartilaginous box adapted to the sha[)e of the brain and sense-organs, and covered with regular bony plates of the same nature as those further back in the
. An introduction to zoology [microform] : for the use of high schools. Zoology; Zoologie. Figr. 47—.The Paddle Fish Polyodon, spatula. (U. S. F. C.) A- of the Mississippi, the latter the ordinary Sturgeon of our Lakes {Acipenser rubicundus) (Fig. 48) and the Shovel-nosed. —The Lake Sturfreon. Aeijmiser rubicundus. ^. (U. S. F. C.) Sturgeon of the Western and Southern States (Scaphirrhyn- chops). In all of these forms the skull is a cartilaginous box adapted to the sha[)e of the brain and sense-organs, and covered with regular bony plates of the same nature as those further back in the body. Polyodon is remarkable for its paddle-shaped snout by means of which it stira u[) the mud in the river bottom, on the minute organisms contained in which it feeds. These are sifted out by means of the long and close set gill-i*akers which form a very efiicient sieve for the muddy water which flows out through the gill-slit. In many )ects Polyodon 8 If m\ n i^ I. 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 Wright, R. Ramsay (Robert Ramsay), 1852-1933. Toronto : Copp, Clark
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Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
