Maryland Geological Survey 61 



Keyes, Charles E. Paleozoic fossils of Maryland. 

 Johns Hopkins Univ. Cir., No. 94, vol. xi, 1891, pp. 28, 29. 



1892 



Lesley, J. P. A summary description of the geology of Pennsylvania. 

 Geol. Survey Pa., voL ii, Harrisburg, 1892, pp. 721-1628 + xxvi. 

 Darton, N. H. Notes on the stratigraphy of a portion of central 

 Appalachian Virginia. 



Amer. Geol., vol. x, 1892, pp. 10-18. 



Hall, James, and Clarke, John M. An introduction to the study 

 of the Brachiopoda intended as a hand-book for the use of students. 



11th Ann. Rept. State Geologist [New York] for the year 1891, 1892, pp. 133- 

 300, 22 plates. 



45th Ann. Rept. New York State Mus. Nat. Hist., 1892, contained the above 

 text on pp. 448-616, but not the plates. 



. Palaeontology, vol. viii. An introduction to the study of the 



genera of Palaeozoic Brachiopoda. 



Geol. Surv. of New York, Albany, 1892, 4to, 368 -f xvi pp., 44 plates. 



1893 



White, I. C. From Cumberland (Md.) to the Ohio River. Geological 

 Guide Book of the Rocky Mountain Excursion, Congres Geolog. Internat., 

 Compte Rendu de la 5me Ses., Washington, 1893, pp. 279-288. 



House Misc. Doc, 53d Cong., 2d Sess., vol. xiii. No. 107, pp. 279-288. 



Williams, George H. The Appalachian region. Geological Guide 

 Book of the Rocky Mountain Excursion, Congres Geolog. Internat., 

 Compte Rendu de la 5me Ses., Washington, 1893, pp. 268-274. 



House Misc. Doc, 53d Cong., 2d Sess., vol. xiii. No. 107, pp. 268-274. 



. Washington, D. C, to Cumberland, Md., Itinerary. Geo- 

 logical Guide Book of the Rocky Mountain Excursion, Congres Geolog. 

 Internat., Compte Rendu de la 5me Ses., Washington, 1893, pp. 274-279. 



House Misc. Doc, 53d Cong., 2d Sess., vol. xiii, No. 107, pp. 274-279. 



Williams, George H., and Clark, William B. Outline of the geology 

 and physical features of Maryland. 



In Maryland, its Resources, Industries and Institutions (World's Fair Book 

 on Maryland). Baltimore, 1893, 67 + viii pp.; and a preliminary geological 

 map of Maryland. 



