“542 The Progress of North American Paleontology. [June 
A. S. Tiffany has a work on the “Geology of Scott County, 
Iowa, and Rock Island County, Ill., and the Adjacent Territory, 
showing the Geographical and Vertical Range of the Fossils 
of the Niagara Corniferous and Hamilton Groups of Rocks, and 
the Chemung Group at Burlington, Iowa, with Supplement. 
Davenport, Iowa, 1885.” 
E. O. Ulrich has “ Descriptions of New Silurian and Devonian 
Fossils, Contributions to American Paleontology, vol. i. p. 3, 
May, 1886, Cincinnati.’ He has a “Report on the Lower 
Silurian Bryozoa, with Preliminary Descriptions of some of the 
New Species,” and “ Remarks upon the Names Cheirocrinus and 
Calceocrinus, with Descriptions of three New Generic Terms and 
one New Species,” in the rgth Ann. Rep. Geol. and Nat. Hist. 
Surv. Minnesota, pp. 57 and 104. 
Charles Wachsmuth and Frank Springer have published “ Re- 
vision of the Palzocrinoidea, Part III. Discussion of the Classifi- 
cation and Relations of the Brachiate Crinoids, and Conclusion 
of the Generic Descriptions, Second Section,” in the Proc. Acad. 
Nat. Sci. Phila., p.65, March and September, 1886. The author’s 
edition contains, in addition to the article in the Proceedings, an 
index of all generic and specific names used in connection with 
the Palzeocrinoidea. 
M. E. Wadsworth has a note “ On a Supposed Fossil from the 
Copper-Bearing Rocks of Lake Superior” in the Proc. Boston 
Soc. Nat. His., vol. xxiii. p. 208. 
C. D. Walcott has an article on the “ Classification of the Cam- 
brian System of North America” in the Amer. Four. Sci., 3d ser., 
vol. xxxii. p. 138. He has also published a “Second Contribu- 
tion to the Cambrian Faunas of North America,” Bull. 30, U. S. 
Geol. Surv. Washington, 1886. 
L. F. Ward has a “ Note on a few Imperfect Leaf Impressions 
from Northern California” in Bu. U. S. Geol. Surv., No. 33, 
p. 16. In the Amer. Four. Sci, 3d ser., vol. xxxi: p. 370, he 
has a note “On the Determination of Fossil Dicotyledonous 
Leaves.” 
Ç. A. White has published “ On the Fresh Water Invertebrates 
of the North American Jurassic,” Bull. U. S. Geol. Surv., No. 29, 
_ Washington, 1886, and “ On the Relation of the ae Mol- 
luscan Fauna to that of the Succeeding Fresh-Water Eocene and 
_ other Groups,” Bull. U. S. Geol. Surv., No. 34. Washington, 1886. 
