;^44 Tlie American Geohx/l-st. December, 189^ 
1<) southwest. Tlu'st' tracts are separated liy others of e(jual or 
greater width upon wliicli scarcely any driuulins are found. 
I'rofs. SliaU'r. Wrii^ht, Hitchcock, and Davis, and the present 
writer, have described the drumlins of Boston and neiolihoring 
areas, where they are admiral)iy developed.* During the years 
1S!M) to 1S92 the drumlins of the entire state of Massachusetts 
have been mapped and carefully studied by Mr. Ueorge H. ]Jar- 
ton, under the direction of Prof. N. S. Shaler, for the United 
States G-eological Survey. Their total number is found to be 
about 1.500, counting, as in New Hampshire, the separate rounded 
summits of compound drumlin aggregations, where two or three of 
these hills, or sometimes more, are merged together at their bases. 
From the vicinity of Spencer, Mass., a series of abundant 
drumlins, according to Davis, extends south to Pomfret in north- 
eastern Connecticut. They probabh' also occur plentifully in 
other parts of this state, reaching southward to Long Island 
sound; for Round hill in Orange, near New Haven, descrilied by 
Prof. J. I). Dana. ai)pears tobe a drunilin.t 
New York has a magnificent area of drumlins. perhaps the 
most interesting in the United States, which stretches more than 
00 miles from Syracuse westward nearly to Rochester, lying be- 
tween lake Ontario and the -'Finger lakes. '"+ These hills are well 
seen along the New York Central and West Shore railroads. 
*N. S. Shaler, "On the Parallel Ridges of Glacial Drift in eastern 
Massachusetts," Proceedings, Boston Society of Natural History, vol. 
XIII, 1870, pp. 196-204. Illustrations of the Earth's Surface : Glaciers. 
1881, pp. 60-63. U. S. Geol. Survey. Seventh Annual Report, for 1886, 
pp. 321-2; Ninth Annual Report, tor 1888, pp. 550-1. 
G. Y. AV right, Proc. B. S. N. H., vol. xix, 1876, p. 58. and vol. xx,1879, 
p. 217. The Ice Age in North America. 1889, chapter xi. 
C. H. Hitchcock. "Lenticular Hills of Glacial Drift," Proc, B. S. N. 
H., vol. XIX, pp. 63-67. 
AV. M. Davis, Illustrations of the Earth's Surface : Glaciers, text de- 
scribing Plate xxiv. Proc, B. S. N. H., vol. xxrr, 1882, pp. 34, 40-42. 
"Drumlins," Science, vol. iv, pp. 418-420, with illustrations, Oct. 31, 
1884. "The Distribution and Origin of Drumlins," .\m. Jour. Sci., Ill, 
vol. xxviii, pp. 407-416, Dec, 1S84. 
Warren Upham, "Glacial Drift in Boston and its Vicinity," Proc, B. 
S. N. IL, vol. XX, 1879, pp. 220-234; "Marine Shells and Fragments of 
Shells in the Till near Boston," Proc, B. S. N. IL, vol. xxiv, 1888, pp. 
127-141, also in Am. Jour. Sci.,III.,voL xxxvii, Mav, 1889. "The Struct- 
ure of Drumlins." Proc. B. S. N. H., vol. xxiv, 1889, i)p. 228-242. 
+Ain. Jour. Sci., Ill, vol. xxvi, 1883, i)p. 357-361. 
tL. Johnson, "The Parallel Hills of western New York," Trans., N. 
Y. Acad, of Sci., vol. i. 1882, pp. 78-80; Annals, do., vol. ir. pp. 249-266, 
with map. 
D. F. Lincoln, "Glaciation in the Finger lake region of New York, 
Am. Jour. Sci., Ill, vol. xi.iv, pp. 290-301, Oct., 1892. 
