Mange of Chouteau Fossils. — Iioivley. 49 
period of its development, may themselves differ greatly from 
one another in the degree of their own development. It is pos- 
sible to trace the evolution of one character from its first ap- 
pearance to its final loss, right through the history of a long 
line of individuals. For the designation of the successive 
stages in the history of a character, the ontogenetic terms 
might he used, with the addition of the prefix morpho- , e. </., 
morphohrephic. morphophebic. 
AlJXOLOGY. 
It does not seem to us that any apology is needed for the 
title of our paper. Growth and change do not stop when the 
embryonic stage has been passed, nor is the study of later 
stages of less importance than that of the earlier. It is in- 
deed possible that the application of these principles to some 
of the problems of. anthropology and sociology might prove 
of practical utility. To predict the future, a- the study of 
gerontic characters enables one to do, is neither less fascinat- 
ing nor less valuable than the embiyologist's decipherment of 
the past. And yet, while a part of this science has it- special 
name, its text-books and its professors, the whole science, 
through being unchristened, is in danger of also being un- 
recognized. In proposing for it the name of "auxology," we 
fulfil a want that ma}- not indeed have long been felt, but that 
would otherwise have been felt more and more with the 
progress of years and knowledge. "We hope that, in discuss- 
ing the terms of this science, we have said nothing to offend 
those who have been ruo>t active in laying its foundations. 
S. S. Buckmax. F. A. Bather, 
Stonehouse, Gloucestershire. Natural History Museum, 
London, S. W. 
RANGE OF CHOUTEAU FOSSILS. 
By R. R. Rowley, Fort Smith, Ark. 
Below, we give the range of the most common species of 
Chouteau fossils in Missouri as facts gathered by ourselves 
in years of collecting from that horizon. The strata pa-- up- 
ward in regular order from left to right, the Kinderhook or 
Waverly being introduced not as a separate division, but to 
receive certain species so referred in neighboring state-, but 
known to occur in the Lower Burlington lied- at Louisiana, 
Hannibal, and elsewhere in eastern Missouri. The star ( *) to 
the right of the name of the specie- shows the presence of 
