160 



and 93, or 43 per cent, I have found only at Linnton, though at 

 least 31 of these have been reported by other collectors from 

 different points in the west. Perhaps it would be safe to say 

 that 50 species of the above list have been collected for the first 

 time on the Pacific coast, or at least within the limits of the 

 state of Oregon. 



PLEISTOCENE PLANTS IN THE MARINE CLAYS OF 



MAINE 



By Edward W. Berry 



The marine clays and associated sands of late Pleistocene age 

 so widely distributed in northern New England and the St. 

 Lawrence Valley and which in a large measure suggested the 

 Champlain stage of the Pleistocene adopted by Dana in the 

 first edition of his Manual have been the occasion of a consider- 

 able literature from the days of Desor down to the present. 



These deposits occur at varying heights above the present sea 

 level up to an altitude of 690 feet according to the recent deter- 

 minations of Johnston.* Most observers have assumed that 

 these deposits, commonly differentiated into "Saxicava sands" 

 above and "Leda clays" below, could be correlated with pre- 

 cision over this area, often on the basis of lithology alone. That 

 this is not true and that each locality must be considered sepa- 

 rately in its relation to topography, physical history, adjacent 

 glacial deposits and fossil content should be obvious. Recently 

 Katz and Keithf have described the Newington Moraine and 

 mapped it from near Port-land, Maine, to Newburyport, Mass. 

 This moraine is correlated with the late Wisconsin and the 

 authors cited present evidence to show that it was submarine in 

 origin and contemporaneous with that part of the so-called Leda 

 clay of that region l^ang seaward of the moraine while the clay 

 lying inside the moraine is younger. On the other hand Little, | 

 who has been making a study of the Waterville (Maine) region 



* Johnston, W. A., Can. Geol. Surv. Mus. Bull. No. 24, p. 5, 1916. 

 t Katz, F. J., and Keith, Arthur, U. S. Geol. Survey Prof. Paper 108B, pp. 11-29, 

 1917. 



t Little, H. P., Bull. Geol. Soc. Am. (in press). 



