164 The At)terica?i Geologist. March, 1899 
42d meeting (Brighton), 1872, p. 103. London, 1873. 
197. *On the Relations of the Middle and Upper Silurian (Clin- 
ton, Niagara and Lower Helderberg) Rocks of the United States. 
Ibid., pp. 103 — 104. (Published in full in the Geological Magazine, 
vol. IX. London, 1872. 4 pp.) 
198. On the Relations of the Niagara and Lower Helderberg 
Formations, and their Geographical Distribution in the United States 
and Canada. Proc. Am. Assoc. Ad. Sci., 22d meeting (Portland, 
1873), pp. 321 — 335. Salem, 1874. 8vo. (Also published in 27th 
-Ann. Rept. St. Mus., 1875, with map.) 
199. Descriptions of Bryozoa and Corals of the Lower Helder- 
l)erg Group. 26th Ann. Rept. N. Y. St. Mus. Nat. Hist., pp. 93 — 115. 
('Published in advance.) Albany,, 1874. 8vo. 
200. The Anderson School of Natural History and Geology of 
Penikese Island. Field meeting Albany Institute. 4 pp. Albany. 
1874. 8vo. 
201. Descriptions of New Species Goniatitidse, with a list of prev- 
iously described species. 27th Rep. N. Y. St. Mus. Nat. Hist., pp. 132 — 
136. (Also published in advance, 1874.) Albany, 1875. Svo. 
202. On the Geology of the Southern Counties of New York and 
adjacent parts of Pennsylvania, especially with reference to the Age 
and Structure of the Catskill Mountain Range. Proc. Am. Assoc. 
.Ad. Sci., 24th meeting (Detroit), 1875. pp. 80 — 84. Salem, 1876. 8vo. 
Also published in American Journal, 3d Series, vol. 12, pp. 300 — 304. 
New Haven, 1876. 8vo. 
203. The Fauna of the Niagara Group in Central Indiana. 28th 
Rept. N. Y. St. Mus. Nat. Hist., documentary edition. 2,2- plates 
and explanations, 1875. Albany, 1876. 
204. *Note upon the Geological position of the Serpentine Lime- 
stone of Northern New York and an Inquiry regarding the relations 
of this Limestone to the Eozoon Limestone of Canada. Proc. Am. 
Assoc. Ad. Sci.. 25th meeting (Bufifalo), 1876, p. 385. Salem, 1877. 8vo. 
Published in Am. Jour.. 3d Ser., vol. 12, pp. 298 — 300, 1876. 
205. Note upon the History and value of the Term Hudson River 
Group in American Geological Nomenclature. Proc. Am. Assoc. 
Ad. Sci., 26th meeting (Nashville). 1877, pp. 259 — 265. Salem, 1878. 
8vo. 
206. The Hydraulic Beds and .A-ssociated Limestones at the falls 
of the Ohio. Trans. Alb. Inst., vol. IX. pp. 167—180. 1877. .\l 
l)any, 1879. 8vo. Also published in Pal. N. Y.. vol. V. pt. ii, pp. 
139—148. Albany, 1879. 4to. 
207. Note on the Genus Plumalina. 30th Rept. N. Y. St. Mus. 
Xat. Hist., pp. 255 — 256. I pi. Albany. 1878. Mus. Ed., 1879. 8vo. 
208. The Fauna of the Niagara Group in Central Indiana. 28th 
Rep., State Museum Edition, pp. 29. 203. 32pl. Albany, 1879. 8vo. 
209. Notice of Some Rejiiarkable Crinoidal Forms from the Lower 
hfelderberg Group. Ibid., pp. 205 — 210. 3 pi. Also imblished in 4to. 
Albanv. 1880. 
