TRIGONOCEPHALUS ATRO-FUSCUS. 45 



General Remarks. I have never seen the Trigonocephalus atro-fuscus, and 

 have therefore given the above description of the animal entirely from notes 

 furnished me by my friend Dr. Troost, of NashvUle. It seems, however, closely 

 allied to the Trigonocephalus contortrix in its habits, and in the arrangement 

 of scales not carinated on the neck, and is in fact called in Tennessee Highland 

 Moccassin. 



