156 Results of Microscopic Examinations of Soundings. 
ir origin.* f 
7th. The question of the original source of the volcanic pro- 
ducts is one of great interest. How far these plutonic es 
No. Latitude. Longitude. No. Latitude. Longitude. 
1. 49°12’ North. 49° 42’ West. | 5. 49° 49’ North, 45° 54’ West. 
2, 49 8 os 49 05 « pO Be. 44 45 2" 
S 49.40 .* 48 29 « | oth 46 * 13:44 
4... 49 49 5 © 46 43 « 
* Since the above was written I have received through the kindness of Lieut. 
Maury a very extensive series of soundings made in the North 
ut a 
ract 
its striking resem eto soundings made im the Gulf Stream off Key Biscayne, 
Florida, by the U. S. Coast Survey. It was in fact a true Globigerina marl, largely 
specimens in containing well ¢ erized green-sand casts of Poly 
mia. _ It differed however from the Florida specimens in containing very few silice- 
ous Diatoms or Polycistins, forms which are remarkably abundant in the Gulf 
Stream and Gulf of Mexico. 
is specimen presented another remarkable character, which I detected evet 
It contains large proportion of volcanic pro- 
imens, but vastly more abun- 
those mn 
to the map for the position of this r 
longitude 130° 40? east, placed it in the very place where a resemblance to 
Stream of the Aflantic was to be depaeled viz., in the “Ja 
As for the volcanic are but too many active sources for 
rials along the line of this Asiatic current. F. ae 
