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A study of some examples of rock variation. (Jour. Geol., vol. 6, 
pp. 372-392, May-June 1898.) 
[Cope, E. D.] 
Edward Drinker Cope, naturalist — A chapter in the history of 
science. By Theodore Gill. (Proc. A. A. A. S., vol. 46, pp. 1-30, 
June 1898.) 
Dean, Bashford. 
Note on the ventral armoring of Dinichthys. (Trans. N. Y. Acad. 
Sci., vol. 16, pp. S7-6i, 1898.) 
Dean, Bashford. 
On a new species of Edestus, E. lecontei, from Nevada. (Trans. 
N. Y. Acad. Sci., vol. 16. pp. 61-69, 1898.) 
Derby, O. A. 
Notes on Arkansas novaculite. (Jour. Geol., vol. 6, pp. 366-368, 
May-June 1898.) 
Eastman, C. R. 
Dentition of Devonian Ptyctodontidas. (Am. Nat., vol. 32, pp. 
473-488, July 1898.) 
Eastman, C. R. 
On remains of Struthiolithus chersonensis from northern China, 
with remarks on the distribution of struthious birds. (Bull. Mus. 
Comp. ZooL, vol. 32, no. 7, pp. 127-144, i pi., Aug. 1898.) 
Eaton, G. F. 
The prehistoric fauna of Block island, as indicated by its ancient 
shell-heaps. (Am. Jour. Sci., ser. 4, vol. 6, pp. 137-159, pis. 2-3, Aug. 
1898.) 
Foote, W. M. 
Note on the occurrence of native lead with roeblingite, native cop- 
per, and other minerals at Franklin Furnace, N. J. (Am. Jour. Sci., 
ser. 4, vol. 6, pp. 187-188, Aug. 1898.) 
Gannett, Henry. 
Physiographic types. (Topographic Atlas of the U. S., folio i, 
4 pp., ID maps, 1898.) 
Gannett, Henry. 
Geographic work of the general government. (Nat. Geog. Mag., 
vol. 9, pp. 329-338, July 1898.) 
Gilbert, G. K. 
Contribution to "A symposium on the classification and nomen- 
clature of geologic time-divisions." (Jour. Geol., vol. 6, pp. 338-340. 
May-June 1898.) 
Gilbert, G. K. 
Origin of the physical features of the United States. (Nat. Geog. 
Mag., vol. 9, pp. 308-317, pis. 8-9, July 1898.) 
