22 



MAINE. 



According to Packard, 1 there are two distinct horizons of the 

 Pleistocene in Maine as is indicated by life-forms. The older is 

 found along the coast at about high-tide mark at the bottom of the 

 bowlder clay. The younger occupies the coast region from the shore 

 line to fifty miles or more inland, and ranging from 25 to 300 feet in 

 altitude. J. D. Dana, in his "Manual of Geology," fourth edition, 

 page 983, makes the statement that the Pleistocene exists along the 

 coast of Maine, and extends back from the shore line some miles at 

 different elevations up to 225 feet. From the places he cites, the 

 Pleistocene localities seem to be in two belts ; one just along the 

 shore line, and the other back at a distance of fifty miles almost 

 parallel with the shore line. The following Pleistocene fossils have 

 been reported from these localities : Leda penula, Leda tenaisulcata, 

 Lcda mimita,Yoldia g\acilis,Pectcn Grooilandicus, Pectcn islandicus, 

 Cardium island icus, Astarte Banksii, Astarte clliptica, Astarte cas- 

 tauca, Thracia Conradi, Macoma fragilis, Macoma sabulosa, Saxicava 

 arctica, Mactra ovalis, Mya truncata, Mya arcnaria, Pholas crispata, 

 Xatica clausa, Lunatia Grocnlandica, Lunatia hcros. The strata 

 containing these shells of undoubted Pleistocene Age are for the most 

 part composed of clay, in which there is a generous intermixture of 

 bowlders. 



NEW HAMPSHIRE. 



• 



According to Dall and Harris, in Bulletin No. 84, United States 

 Geological Survey, there is in the southeastern part of Portsmouth a 

 deposit of blue plastic clay, containing Nuciria, Macoma and a few 

 recent forms, which is doubtless of the same age as the Pleistocene 

 just described as occurring on the coast of Maine. 



MASSACHUSETTS. 



There are several exposures of fossiliferous Pleistocene beds along 

 the coast of Massachusetts and on the neighboring islands. Later in 

 this paper there is given a partial list of Pleistocene fossils found at 

 Sankoty Head on the Island of Nantucket. The strata here consist 

 of clay at the base, of thirty-three feet of sand, gravel and clay con- 



1 "Results of Observations on the Drift Phenomena of Labrador and the 

 Atlantic Coast Southward" (Am. Jour. Sci., 2d sen, Vol. XLI, pp. 30-32) ; 

 "Observations on the Glacial Phenomena of Labrador and Maine, etc." (Am. 

 Jour. Sci., 2d ser., Vol. XLIV, pp. 117, 118). 



