ALKALOIDAL TOXINS. 7 



GROUP I. 



CADAVERIC PTOMAINES OF UNDETERMINED MICROBIAL 



ORIGIN. 



a. Amines. 



b. Guanidines. 



c. Oxamines (fatty or aromatic). 



d. Amido Acids. 



e. Carbopyridic Acids and analogues. 

 /. Undetermined Ptomaines. 



GROUP II. 



PTOMAINES OF KNOWN MICROBIAL ORIGIN. 



a. Ptomaines extracted from microbial cells. 



b. Ptomaines from pathological urines. 



We will not here enter upon a detailed study of 

 the bases belonging to each of these groups. This 

 subject is a vast one, requiring for its treatment 

 a volume devoted to it alone. We will here simply 

 touch upon the principal properties of several of 

 the bases of each of the subgroups named. 



BASES OF GROUP I. 



a. Amines. Among these we find nearly all the 

 fatty amines, such as the methylamines and the 

 cyclic alkaloids such as pyridine. They are formed 

 particularly by the putrefaction of fish. 



Certain of these bases are very toxic, for in- 



