CROTALUSOREGANUS. 117 



General Remarks. I have never seen but one specimen of this serpent, and 

 that was furnished me by the celebrated naturahst Mr. Nuttall, who procured it 

 in the Oregon territory. There can be httle doubt of its being a new species, as 

 it differs from the Crotalus horridus in wanting the black lines along the neck; — 

 from the Crotalus durissus, in not being banded; — from the Crotalus adamanteus, 

 in having white lines about the head, in the form and arrangement of its vertebral 

 spots and the number of its abdominal plates; — and from the Crotalus tergeminus, 

 which of all its colour most resembles, in having scales and not plates on the 

 vertex. 



