Correspondence. 255 
Stevenson, John J. 
Memoir of James Hall. (Bull. Geol. Soc. Am., vol. 10, pp. 425- 
451, with bibliography and two portraits, 1900.) 
Walcott, C D. 
Lower Cambrian terrane in the Atlantic province. (Proc. Wash. 
Acad. Sci., vol. i, pp. 301-339, plates 22-26, Feb. 14, 1900.) 
Walcott, C. D. 
Random, a pre-Cambrian upper Algonkian terrane. (Bull. Geol. Soc. 
Am., vol. II, pp. 3-5, 1899.) 
Walcott, C. D. 
Cambrian fossils of the Yellowstone National Park. (Monograph 32, 
U. S. G. S., Part 2, pp. 439-466, plates 60-65, 1899.) 
Walker, B. E. 
Canadian surveys and museums, and the need of increased ex- 
penditure thereon. (Proc. Can. Inst. Toronto. Nov. 11, 1899 [1900].) 
Watson, Thomas L. 
Some higher levels in the post-glacial development of the finger 
lakes of New York state. (Rep. N. Y. state Mus., 1898. Appendix 
B, pp. 57-117, plates and maps.) 
Weller, Stuart. 
Kinderhook faunal studies. (Trans. Acad. Sci., St. Louis, vol. 9, 
pp. 10-51; vol. 10, pp. 57-129, 1899 and 19CO, 14 plates of fossils.) 
White, Theo. G. 
Upper Ordovician faunas of lake Champlain valley. (Bull. Geol. 
Soc. Am . vol. 10, pp. 452-461, 1898 [19C0J.) 
Williams, H. S. 
Silurian-Devonian boundary in North America. (Am. Jour. Sci., 
vol. 9, pp. 203-213, Mar. 1900.) 
COPxRESPONDENCE. 
Mr. VValcott'sviewofthe Etcheminian.— In a recent paper* Mr. 
Walcott gives the result of his studies in Newfoundland and New 
Brunswick last year. The article is chiefly devoted to traversing the 
writer's statement that there is a Palaeozoic terrane beneath the Cam- 
brian of the Atlantic provinces, distinct from the Cambrian by its 
fauna and stratigraphy. 
About half of the article is devoted to a description of various sec- 
tions in Newfoundland, from which Mr. Walcott endeavours to show 
that the "Olenellus fauna" extends throughout the terrane which the 
writer had referred to "Etchcminian." On analyzing the notes on 
*Lower Cambrian Terrane in the Atlantic province, by C. D. Wal- 
cott (Proc. Washington Acad. Sci., Vol. I, p. 301. Feb., 1900). 
