LOWER SILURIC SHALES OF THE MOHAWK VALLEY 7 1 



(24) Darton, N. H. Preliminary Report on the Geology of Albany 



County. 13th Annual Report N. Y. State- Geologist, i :22g-6i. 



(25) Darton, N. H. Geology of the Mohawk Valley, i : Herkimer, 



Fulton, Montgomery and Saratoga Counties. N. Y. State 

 Geol. Rep't 13 (for 1893), p. 407. 



(26) Hyatt, Alpheus. Phylogeny of an Acquired Characteristic. 



Proc. Amer. Philos. Soc. 2^, rio- I43- 



(27) 1895 Ruedemann, Rudolf. Development and Mode of Growth of 



the Genus Diplograptus, McCoy. N. Y. State Geol. Rep't 

 14 (for 1894), p. 15, 217. 



(28) Ulrich, E. O. Low^er Silurian Bryozoa of Minnesota. Geol. 



Minn, v, 3, pt i, Paleontology. 



(29) Winchell, N. H., & Schuchert, Charles. The Lower Silurian 



Brachiopoda of Minnesota. Geol. Minn., v. 3, pt i, Paleon- 

 tology. 



(30) 1896 Harper G. W., & Bassler, R. S. Catalogue of the Fossils of 



the Trenton and Cincinnati Periods, Occurring in the Vicinity 

 of Cincinnati, Ohio. Cincinnati, 1896. 



(31) Gregory, J. W. On the Classification of the Palaeozoic 



Echinoderms of the Group Ophiuroidea. Proc. Zool. Soc. 

 London, 64:1035. 



(32) 1897 Clarke, John M. The Lower Silurian Trilobites of Minne- 



sota. Geol. Minn. v. 3, pt 2, Paleontology. 



(33) Prosser, C. S., & Cumings, E. R. Sections and Thickness of 



the Lower Silurian Formation in West Canada Creek and 

 in the Mohawk Valley. N. Y. State Geol. Rep't 15 (for 



1895), p. 615. 



(34) Prosser, C. S., & Rowe, R. B. Stratigraphic Geology of the 



Eastern Helderbergs. N. Y. State Geol. Rep't 17 (for 1897), 

 p. 329. 



(35) Ruedemann, Rudolph. Note on the Discovery of a Sessile 



Conularia. N. Y. State Geol. Rep't 15 (for 1895), p. 699. 



(36) Ruedemann, Rudolph. Evidence of Current Action in the 



Ordovician of New York, Amer. Geol. 19:367. 



(37) Schuchert, Charles. Synopsis of American Fossil Brachi- 



opoda. Bull. U. S. Geol. Surv. 87. 



(38) Ulrich, E. O. The Lower Silurian Lamellibranchiata of 



Minnesota ; The Lower Silurian Ostracoda. Geol. Minn. 

 V. 3, pt 2. 



(39) Ulrich, E. O., & Scofield, W. H. The Lower Silurian Gas- 



tropoda, ibidem. 



(40) 1898 Whitfield, R. P., & . Hovey, E. O. Catalogue of the Types 



and Figured Specimens in the Palcontological Collections 

 of the Geological Department, American Museum of 

 Natural History, Bui. Amer. Mus. Nat. Hist. 11 :r. 



(41) 1899 White, T. G. Report on the Relations of the Ordovician and 

 I Eo-Silurian Rocks in Portions of Herkimer, Oneida and 



Lewis Counties. N. Y. State Mus. Rep't 51 (for 1897), P- 21. 



