The elasmobranch fishes (1934) The elasmobranch fishes elasmobranchfish03dani Year: 1934 10 THE ELASMOBRANCH FISHES fish we see sufficient modification of form to insure a new mode of locomotion. Here the pectorals become the elfective organs in propulsion, and the tail remains at a stage of development insufficient to propel the body. The skate is also an organism not only singularly adapted to its method of getting food, but equally effective in crouching on the ocean floor so as to evade its enemies. Last in the series we may place the sting ray, Disceus thayeri (fig. 21), which even more
The elasmobranch fishes (1934) The elasmobranch fishes elasmobranchfish03dani Year: 1934 10 THE ELASMOBRANCH FISHES fish we see sufficient modification of form to insure a new mode of locomotion. Here the pectorals become the elfective organs in propulsion, and the tail remains at a stage of development insufficient to propel the body. The skate is also an organism not only singularly adapted to its method of getting food, but equally effective in crouching on the ocean floor so as to evade its enemies. Last in the series we may place the sting ray, Disceus thayeri (fig. 21), which even more than TJrolophus undergoes profound depression of body. In Fig. 19
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