DRO RVELE 
THERE is nothing more remarkable in the whole range of 
geological history than the peculiar associations and successions 
of contrasted faunas and floras and of glacial beds and coal 
deposits in the southern portion of the eastern continent during 
the closing Paleozoic and opening Mesozoic eras. Scarcely less 
interesting are the shifting relations of faunas and floras and the 
implied geographic connections and disseverances of the ages 
which follow these and find expression in the eastern part of the 
same continent and the western portion of our own. The con- 
tributions of the last two or three decades from the circum- 
Pacific provinces have done much to break down current inter- 
pretations of geological history and to build up new ones. And 
there is doubtless more to come. In this field, with little ques- 
tion, lies the solution of many radical problems. It is therefore 
a matter of congratulation that, beside the work of the national 
and state surveys, two rapidly rising universities on our Pacific 
border are vigorously pushing geological inquiry and rapidly 
giving the public the benefit of their results. The nearly simul- 
taneous offering of three papers relating to California geology, 
and the knowledge that others were in preparation, suggested 
the gathering of these into a California number of the JOURNAL, 
both as a means of concentrating interest and as a recognition 
of the richness of the field and the industry and ability of its 
workers. ECA 
In the editorial of the last number the words ‘‘and ten”’ on 
page 341 at the end of the fifth line from the bottom should be 
omitted. 
496 
