The Ice- Sheet of Greenland. — Ujyhaui. 145 
than in ,S'. pufrydna, and the mesial fold divided by a deep groove. These 
beds also furnish a Terebratula that may be representative of 2'. iowensis 
Calvin, found in association with S. porri/tani near Fayette, lovra. An 
Orthis related to 0. ioiccn.-sis Hall, a small, undetermined Rhynchonella 
and numerous stems of Striatopora, complete so far as observed the 
fauna of beds, number 7. 
In addition to the seven beds here recognized the Devonian of 
Buchanan county eml)races Ijeds containing Rcussdaria joluinni 
Hall and Whitfield, but the relation of the Rensselaria beds to 
the beds above described has not been definitely ascertained. 
Rocks with Rensselaria are in place at Fairbanks above Littleton, 
and some detached fragments containing this genus were found 
at Littleton and at Jesup. 
The fossils fonnd in numbers 5, G, and 7 resemble ver}- closely 
the assemblage of species cited by Messrs. Hall and Whitfield in 
the twenty-third report on the state cabinet of Xew York, p. 224, 
as occurring at Waterloo, Iowa. The Spirifer from the shale beds, 
number 7, sometimes resembles very closely *S'. oiceni and again 
it is not unlike certain forms of S. mannl. Li the paper cited, 
p. 225, Hall and Whitfield infer that the Waterloo beds are more 
nearly related to the Upper Helderberg limestones of Xew York, 
while the Independence beds that contain Sjnrifeni pennnta ma}^ 
in their judgment be the representative of the Xew York Hamil- 
ton. The observations set forth in this paper clearl}' demonstrate 
that the coral bearing l)eds at Waterloo are 3'ounger than the 
Spirifera pennata beds at Independence. 
THE ICE-SHEET OF GREENLAND. 
Bv Wauuen L'puam, Somerville, Mass. 
^•1 Reconnoisumice of the Greenland Inland Ice. R. E. Peary, Civil 
Engineer, U. S. Navy. Bulletin of the American Geographical Society, 
vol. xix, pp. 261-28!), Sept. 30, 1887. 
The Glaciers of Greenland. PuoF. G. F. Wright, The Ice Age in North 
America, chap, iv, pp. 67-91. (D. Appleton & Co., 1889.) 
The First Crossinri of Greenland. By Fridtjop Nansen. Vol. i, pp. 
xxii, 510; with 3 maps, 7 plates, and 78 woodcuts in the text. Vol. ii, 
pp. X, 509; with 2 maps, 5 plates, and 73 woodcuts. ( London: Longmans, 
Green & Co., 1890.) 
^1 proposed Exploration of northern Greenland. An address before the 
American Geographical Society, April 13, 1891, by R. E. Peary, U. S. N. 
Bull., Am. Geog. Soc, vol. xxiii, pp. 1.57-171, .June 30, 1891. 
