THE ALIMENTARY CANAL 



28 5 



the cuttlefish, but offers a still more striking analogy to 

 the gizzard of a bird, having very thick walls, and the 

 muscular fibers radiating precisely in the same manner, 



FIG. 246. Anatomy of the Carp: br, branchiae, or gills; c, heart; f t liver; v.n, v.n'. 

 swimming bladder; c.i, intestinal canal; 0, ovarium; u, ureter; a, anus; o' ', gen- 

 ital opening; ', opening of ureter. The side view shows the disposition of the 

 muscles in vertical flakes. 



