. On the anatomy of vertebrates [electronic resource] . than the first, and having a tumid valvular margin. The cardiac orifice of the stomach is occasionally defined by aconstriction, as in the Planirostra and Mormyrus, fig. 280: butan increased expansion with increased vascularity and a moredelicate epithelial lining of the mucous membrane more usuallyindicate, in Fishes, the beginning of the digestive cavity. Thestomach is a simple and commonly an ample cavity, with agreat disproportion in the diameters of the cardiac and pyloricorifices ; in the Cornish Porbeagle-Shark, for example, the ca
. On the anatomy of vertebrates [electronic resource] . than the first, and having a tumid valvular margin. The cardiac orifice of the stomach is occasionally defined by aconstriction, as in the Planirostra and Mormyrus, fig. 280: butan increased expansion with increased vascularity and a moredelicate epithelial lining of the mucous membrane more usuallyindicate, in Fishes, the beginning of the digestive cavity. Thestomach is a simple and commonly an ample cavity, with agreat disproportion in the diameters of the cardiac and pyloricorifices ; in the Cornish Porbeagle-Shark, for example, the cardiacentry will readily admit a childs head, whilst the pyloric outletwill barely allow of the passage of a crow-quill. There are two predominant forms of the stomach in Fishes, i siphonal and the (cascal. In the first it presents the form ofa bent tube or canal, as in the Turbot, fig. 287, «, b, Flounder,Sole, Cod, Haddock, Salmon, fig. 286, a,b, Carp, Tench, Ide, Lump-fish, File-fish, Lepidosteus, Sturgeon, Paddle-fish, and most Plagio- 278. Alimentary canal of Shark, cclxvi. stomes, fig. 278 : in the second form the cardiac division of thestomach terminates in a blind sac, and the short pyloric portion iscontinued from its right side, as in the Perch, the Scorpama, theGurnards, the Bull-heads, the Smelts, the Whiting, fig. 285, theAngler, the Pike, the Lucioperca, the Sword-fish, fig. 282, theSilurus, the Herring, the Sprat, fig. 288, the Pilchard, theConger, the Mura3na, and the Polypterus, fig. 279. A transi-tional form, in which the pyloric end is bent so abruptly upon ALIMENTARY CANAL OF FISHES. 417 279
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