
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 499 
zoón, furnished by Dr. Dawson of Montreal, ps one from the Devil's 
Den, fully established the discovery. Ina letter from Mr. Bicknell which 
we have seen, he says — “ I have no ea e, in saying, if the Canadian 
specimen is Eozoón, the Newburyport one is also." — H. C. PERKINS. 

PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
—— 0M 
Prof. A. E. VERRILL read a aper **On the comparison of the Coral 
fune of the Atlantic and Pacific Coasts of the Isthmus of Darien, as 
o0 S. 
across the Isthmus of Darien, has very important bearings both in Zoól- 
98y and Geology. With many geologists it has been a favorite and con- 
venient theory to account for climatic changes in Europe by a depression 
of the Isthmus sufficient to allow the Gulf Stream to flow into the Pacific. 
Admitting à connection it does not necessarily follow that the Gulf Stream 
would flow into the Pacific, for a current in the opposite direction might 
iffere i id 
e 
from m Geology i is quite insufficient to establish the theory, and the facts 
cited have in most cases proved unreliable. The zoólogical evidence is 
1 ic i 
; = 
het. Since his lists were published other species ha een added to 
y ong whic dia bullata, a com Indian shell, 
d = pecie of Crustacea as Beni and “although 
150 species of Decapods, ten or twelve appear to be per- 
ad identical, not showing even varietal QURE Among 173 epici 
>> marine fishes from both coasts Dr. Günther regards fifty-se 
Îdentica], Mr. Gill would, homeven. on some of these e ua 
Pus e result would still remain the same, since certain species 
3o not OW even varietal ifrences 
and tabulated by the author * and gave very 
dierent results, for of eighty-two eds found on the west coast none 
Deora Music dei. 
* Transactions of the Connecticut Academy, Vol. I, p. 339, 1867. 

