The Structure And Regeneration of the Poison Glands of Plethodon
The Structure And Regeneration of the Poison Glands of Plethodon
Calvin Olin Esterly
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The facts just related have been gained entirely from a stud\ of preparations made from material taken from unstimulated animals, that is those not irritated prior to immersion in killing fluids. The evidence along this line is stronger and more con- vincing in the case of an animal which, without stimulation of any kind other than such as might have occurred in nature, got rid of a great deal of the secretion in the glands of the tail and then cast that organ off, as if it could be of 110 furt...her use. The animal in question, when first observed, was seen to be entangled head down between some pieces of bark in the terrarium in which it was confined. This seemed to irritate the salamander very much, for when it freed itself it began moving quickly about, swinging its tail from side to side like an angry cat. The tail, during this time, became covered with a very abundant white secretion, After about five minutes of such behavior on the part of the animal, when I merely touched the tail it was suddenly thrown off, the break being in the constriction back of the cloaca.
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