\i (.'oiiteiitn. 
I'crsouol and Scieiitific Neirs.—Wc.st Virginia Geological Survey, 342.— 
Dr. Hans Reiisch, 34;{.— Messrs. Schuchert and White, 343.— New 
Y'ork Academy of Sciences, 344. 
DECEMBER NUMBER. 
(Teology of the St. Croix Dalles. C.P. Berkev. [Plates 
XX-XXII.] ^4o 
Drunilins Containine: or Lying- on Modified Drift. War- 
ren Ufham •^>83 
A Sphinctozoan Ca lei sponge from the Upper (Uirbonifer- 
ous of Eastern Nebraska. J. M. Clarke. [Plate 
XXIIL] 387 
On Glacial Deposits in the Driftless Area. F. W. Sarde- 
soN 39:2 
Editorial Comment. — The close of the Twentieth Volume, 403. — The 
Taconic according to Renevier. 40.5. 
Recent Publications, 408. 
Correspondence. — The Seventh International Congress of Geologists, 
Persifok Frazek, 409. 
Pamonal and Scientific News. -Dr. Robert Bell's Examinations in 
Baffinland.— Dr. Fridtjof Nansen in the Northwest.— Dr. Persifor 
Frazer on the Structure of the Urals, etc., 419. 
Index, 421. 
Errata for Vol. XIX. 
Page 399, line 17, for "youngest of," read young of. 
Page 406, line 18, "Olenoides^'' should be Olenelloides. and the r^aiue change should 
be made in the footnote at the bottom of the page. This Scotch genus is the one re- 
ferred to at p. 404, line 3. The resemblance in aijpearance of this name to Olenoide,- 
is misleading; but Olenoides is Middle Cambrian, and a synonym of Dorypyge. 
Page 407, line 2. Keverse the reference to the comparative abundance of A. brevi- 
J'r(in.i and A. porvifrons. 
Errata for Vol. XX. 
Pago 44, line 21, for -13, 14,21 and 23," read 14, 15, 22 and 23. 
Page 53, line 6 from the bottom, for "percolating lime," read cliloridc of lime. 
Page 83, line 15, for "biographical" read bibliographic. 
Page 84, line 7. for "China" read Chili. 
Page 86, line 18, for "claim" read claims. 
Page 88. After line 14, insert "First Reporton the Geology of tin- Public Lands of 
the State of Maine. Senate No. 89. Boston, 1837, pp. 47." 
Page 96, line 15, for "liv" read iv. 
Page 106, line 8 from the bottom, for "on" read of. 
Page 110, line 7, for "Morion" read Marion. 
Page 201, lino 21 from the bottom, for "metres" read miles. 
Page 320, line 9, for "chronologique" read g6ologiquo. 
