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doi: 10.1038/051223f0
THE curious condition of apparent death, assumed by the English grass snake, which Mr. G. E. Hadow describes (NATURE, December 6, p. 127), is one that I have frequently observed, but have always been puzzled to account for I hardly think that it has anything to do with simulation, or that it is voluntary, since I have seen snakes so affected when quite undisturbed in their cases. I have also observed precisely the same state in the common Italian snake. In my experience the condition only occurs in fairly hot weather, and when the snake has not fed for some time. This seems to point to a species of fainting fit, and I imagine that it is immediately induced by a disturbance of the cerebral circulation.
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