ANCIENT WATER LEVELS OF CHAMPLAIN-HUDSON VALLEYS 213 



I collected in the delta sands south of the railroad station at 

 an altitude of about 155 feet above sea level rather abundant 

 Macoma groenlandica, common Saxicava rugosa, 

 a few Leda portlandica, fragments of a Balanus, two 

 specimens of Cylichna alba (?). In the same horizon Mr 

 P. T. Coolidge, of Watertown Mass., found in 1903 a fragmentary 

 Mytilus edulis. At a lower horizon about 25 feet above 

 the lake and 3 feet below the top of the clay Mr Coolidge found 

 Mytilus edulis common, Macoma groenlandica 

 rather common, and one specimen of Saxicava rugosa. 



Mr Coolidge has also found shells in clay about 15 feet above 

 the lake on the south side of the swamp 1 mile north of Port 

 Kent. This locality afforded Saxicava rugosa common, 

 Leda arctica and Macoma groenlandica, together 

 with an undetermined lamellibranch.'^ 



Fossils at Willshoro. Macoma groenlandica and 

 Mytilus edulis were collected from the clays in the road 

 gutter 1/4 mile west of the railroad station, and south of the 

 station at an elevation of about 220 feet above sea level. The bed 

 of shells at this locality is 3 inches thick. 



Fossils on Crown Point Peninsula. Macoma groen- 

 landica was observed in the clays a few feet above the lake 

 level on the west side of Crown Point fort ruinsi at an elevation of 

 about 110 feet above sea level. This is the southermost point at 

 which I have observed marine shells on the New York shore of 

 Lake Champ lain. 



Marine shells on the Vermont shore. The Vermont geologists 

 have reported a number of localities at which shells have been 

 found in the clays in that state. The following abstract of the 

 reported occurrences has been made with the view of comparing 

 the elevation and southward extension with the occurrences 

 known in New York. 



According to the Vermont report of 1861, fossil marine shells 

 were found at Swanton at an elevation of 140 feet; at Milton 

 Falls, the highest locality, at 298 feet ; at Colchester, at 320 feet ; 



^ While this report is passing through the press Mr Peet reports fossils at 

 300 feet elevation back of Port Douglas on the south of Trembleau moun- 

 tain. Jour. Geol. 1904. 



