Editorial Comment. 128 
and then turns suddenly east. Of course so much time has 
elapsed since the existence of this river that we should not 
look for many distinct signs of the old channel ; yet we may 
expect some indications as to its former course in the sti*eam 
which robbed the Wind gap of its water. That the upper 
portion of McMichael's creek is a part of the Wind Gap river 
seems quite probable, when you consider that this is the creek 
which would have had the best chance, among all the streams 
of this district, to cut back to the line of the old Wind gap 
drainage. 
If, as is altogether probable, the relative sizes of the Lehigh 
and Delaware rivers and their tributaries have been approxi- 
mately the same during their history, it is clear that the trib- 
utaries of the Delaware would cut back to the Wind gap river 
tirst, since it is larger than the Lehigh and also nearer to the 
Wind gap. Thus, although the difliculties of tracing the 
course of an abandoned preglacial stream in the glaciated re- 
gion are very great, indications all seem to point to McMich- 
ael's creek as the thief which, long before the Ice age, robbed 
the Wind gap of its eroding stream. That the drainage has 
been somewhat changed by the glacial deposits must be ad- 
mitted. But, with Blue mountain to the south, higher land 
to the north and the divide between the Lehigh and Delaware 
rivers to the west, there must have been, dui-ing the history of 
the Delaware, a preglacial stream flowing nearly in the pres- 
ent course of McMichael's creek. 
EDITORIAL COMMENT. 
Supposed Pre-Taconic Organisms. 
The outlook for the detection of organic remains in Archean 
rocks is not encouraging. Since the passing of Eozoon, albeit 
with a vigorous kick, there seems to have been a panic among 
the spectral organisms of the crystallines. The Archean 
sponge described by Matthew turns out to be an effect of 
crystallization, other so-called fossils from the Canadian Ar- 
chean seem to be largely subjective organisms, and now the 
radiolarians and sponges, the announcement of whose pres- 
ence in the crystalline rocks of Brittany elicited wide-spread 
interest, after an analysis by HaulV are claimed to I)e (the ra- 
