106 TRANSACTIONS OF THE [MAR. 17, 
these did not give satisfactory proof of the fauna to which they 
belonged, and in 1892 Mr. W. D. Matthew, at the author’s sug- 
gestion, began a more careful and detailed examination of the 
strata of the St. John group underlying the Paradoxides beds. 
This investigation was not without reward. for it resulted in the 
discovery of several new species of trilobites and of other crus- 
taceans, brachiopods, etc., which showed that the fauna was a 
new one, different from any that had been described. 
The chief merit of the explorer’s work was that he carefully 
distinguished the fossils that came from the different assises of 
the Sub-Paradoxides beds and was thus enabled to show that 
three distinct subfaunas were present in these underlying beds 
of Band b. The stratigraphical features of these assises had 
already been indicated by the writer, there. being five of them, 
and the. two subfaunas found by W. D. Matthew were in 
Assises 2 and 3, the fauna of Assise 1 having been already 
partly made known by the present author. 
Numbered from below upward, there are the following sub- 
faunas in these several assises: 
1. Subzone of Hipponicharion eos (Ostracod). 
2. bs ‘“ Protolenus elegans. 
3. .* “ Protolenus paradoxoides. 
4. i ‘“ Beyrichona tinea (Ostracod). 
5. z Crustacean fauna unknown. 
None of the trilobites pass from one of these subzones to the 
other, and few of the other crustaceans. 
The species collected by the author and by W. D. Matthew 
from Band b, between the years 1881 and 1893, were the more 
common or more easily recognized species; whereas a number 
of those collected last summer were either rare species that had 
not been previously obtained, or parts of species already in 
hand, of which the material obtained in earlier years was imper- 
fect. and the species had therefore been left undescribed. From 
this point of view it will be seen that the collections made last 
year for Columbia College are a clear gain to science, as the 
author has thus been enabled to describe several crustaceans 
and other forms, which without the additional information thus 
obtained could not have been presented. 
e Section AT HANrorpD Brook. 
Among the various exposures of the Cambrian rocks in south- 
ern New Brunswick there is none which shows more clearly the 
succession in the lower part of the System than the section on 
