. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. TIIK TIJOUT. 327 3 passage in usoful m tlie oxtrcmo, as the fiah is liable to be infested while in the river with various piirasiti.; , which cannot endure salt water, and fall off on its entrance into thn , ^vhlle the nuinne parasites are in a similar manner killed by fresh water, and die wln'ti the fish re-enters the rivers. TheSalmon is a most voracious fish, and its mouth is supplied with a tremendous array of teeth. In the upper jaw t
. The illustrated natural history [microform]. Reptiles; Fishes; Mollusks; Natural history; Reptiles; Poissons; Mollusques; Sciences naturelles. TIIK TIJOUT. 327 3 passage in usoful m tlie oxtrcmo, as the fiah is liable to be infested while in the river with various piirasiti.; , which cannot endure salt water, and fall off on its entrance into thn , ^vhlle the nuinne parasites are in a similar manner killed by fresh water, and die wln'ti the fish re-enters the rivers. TheSalmon is a most voracious fish, and its mouth is supplied with a tremendous array of teeth. In the upper jaw the edge of the jaw-bone is supplied with a row of teet'i â insule whu'h runs a second row based on the bones of the palate. Along the roof of the mouth. IS placed a single straight row of teeth, set on a bone technically called the "vomer" llK. lower ,,aw-bone is furnished with its row of teeth lo match those of the upper jaw an. each edge of the tongue is alsr. toothed. When the jaws are closed, these complicated (. lock into each other in a most admirable fashion, the single row of the under aw lifting between he two ranks of the upper jaw, and the straight row of teeth on the vomer ,.xnct y eomnig between the two sets of tongue teeth. The vomerine teeth are, however only to be found in perfection m the young , as they are gradually lost during the .rrowth of their owner and in an old are mostly reduced to two or three in number while in some very old specimens one solitary tooth remains, set on the veiy front of the ^'onier, the sole survivor of the former array. The food of the Salmon is extremely varied, as must necessarily be the case with a fish hat passes its life alternately in fresh and salt water, and is certainly of an animal nature but the precise creatures that form its sustenance are not accurately known ⢠it is' however, known to feed largely on some varieties of the echinus, or sea-urchin' lastuhoiis as the Salmon may be in some cas
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Keywords: ., bookcentury1800, booksubj, booksubjectfishes, booksubjectmollusks
