to the equatorial region and similarly for the north. In the North Atlantic, the mollusca often eliminating the circumtropical forms wholly find their distinctive American on the American side and distinctly European on the European side. Leaves little evidence for a land connection Europe with Iceland, Greenland and N. A. In the North Pacific the American and Japanese mollusca have much in common. Dalle is now looking into the correlation of everything and one thing. Listened to Gilles' lecture before the National Academy. Great tangential movements in N Carolina both in the Piedmont Plateau and Appalachian region. The shortening of the Appalachian belt at least 35 miles and may be as small as 45 miles. The entire mountain has moved to the north (=90 m). The great Eridol overthrust he said was shared eastward in Norway and southward in East- land. Overthrusting can take place in two ways one thrusting upwards in which case the edge is