MARYLAND GEOLOGICAL SURVEY 45 



HiGGiNS, James. A Succinct Exposition of the Industrial Resources 

 and Agricultural advantaojes of the State of Maryland. 



Md. House of Delegates, Jan. Sess., 1867 [DD], 8vo, 109, iii pp. 

 Md. Sen. Doc, Jan. Sess., 1867 [U]. 



1871. 



Shaler, N. S. On the Causes which have led to the Production of 

 Cape Hatteras. 



Proc. Boston Soc. Nat. Hist., vol. xiv, 1871, pp. 110-121. 



1880. 

 Dana, J. D. Manual of Geology. 3d edit. 



1881. 



Heilprin, Axgelo. On the Stratigraphical Evidence Afforded by 

 the Tertiary Fossils of the Peninsula of Maryland. 

 Proc. Acad. Nat. Sci., Phila., vol. xxxii, 1880, pp. 20-33. 



1882. 



Heilprin, Angelo. On the relative ages and classification of the 



Post-Eocene Tertiary Deposits of the Atlantic Slope. 



Proc. Acad. Nat. Sci., Phila., vol. xxxiv, 1882, pp. 150-186. 

 (Abst.) Amer. Jour. Sci., 3 ser., vol. xxiv, 1882, pp. 228-229. Amer. Nat., 

 vol. xvii, 1883, p. 308. 



1884. 

 Heilprin, Angelo. The Tertiary Geology of the Eastern and 

 Southern United States. 



Jour. Acad. Nat. Sci., Phila., 2 ser., vol. ix, 1884, pp. 115-154, map. 



Contributions to the Tertiary Geolog}^ and Paleontology of 



the United States. 4to. 117 pp., map. Phila., 1884. 



1885. 



Williams, Jr. A. (Editor). Infusorial Earth. 

 Mineral Resources U. S., 18S3-18S4, Washington, 1885, p. 720. 



1887. 



Day, D. T. Infusorial Earth. 



Mineral Resources U. S. 1886, Washington, 1887, p. 537. 



