1895J MICROSCOPICAL JOURNAL 321 



smallest size up to one of two or three pounds, as well 

 as forarainiferous ooze, one portion of which was very 

 much more clayey than the other portion. Captain 

 Troot defines the position from which the material came 

 as follows: 



" Herewith the stones I spoke to you about. They 

 come from a depth of 2450 fathoms in latitude 49° 50' N., 

 longitude 40° 15' W. The current in this vicinity runs 

 strong to N". E., varying sometimes two or three points 

 either way, doubtless influenced by the moon. The 

 surface temperature ranges from 54° to 59° Fahrenheit. 

 This is as it is found nearly all the months of June and 

 July. A little farther west we found cold water and 

 very little current. I am also sending some Globigerina 

 ooze which came up in tlie same mushroom anchor with 

 the stones — the anchor being full except on one side 

 where it had been washed out while heaving up, thereby 

 exposing the stones. " 



The spot is therefore not far from 700 miles south by 

 east of Grreenland and something over 300 miles north 

 by east from Newfoundland. It is beyond the Great 

 Banks and well down into the profounder depths of the 

 Atlantic, and just on the margin of the Gulf Stream, 

 where it is tangent to that vast eddy whose circumference 

 also sweeps drift from the regions of Iceland, brushes past 

 the coast of Greenland and skirts the concave of Labra- 

 dor and Newfoundland and to the Gulf Stream ^tgain. 



The stones were mostly very black in appearance, as 

 if encrusted with manganese ; but on testing this color 

 gave only the reaction of iron. The most abundant 

 were compact and vesicular lavas. There were also 

 present fragments of gneiss, hornblende and limestones 

 dark and vvhite. Quartz- grains and mica scales also 

 abounded in the sand. All these pebbles were apparent- 

 ly more or less water-worn, one specimen showing evi- 

 dence of glacial polishing. 



