MARYLAND GEOLOGICAL SURVEY XVll 



which the results of his wide knowledge of the Miocene of this and other 

 countries have been incorporated. This chapter is by far the most impor- 

 tant contribution to the interpretation of the Maryland Miocene deposits 

 which has been hitherto made and shows in a highly philosophical manner 

 the relationship of the Maryland Miocene fauna to that of other regions 

 and to the recent fauna. 



The systematic paleontological investigations have been jointly con- 

 ducted by several experts. Many of them are recognized authorities in 

 the subjects which they have discussed. The Mammalia, Aves, and 

 Eeptilia have been studied and described by Dr. E. C. Case of Milwaukee, 

 Wisconsin ; the Fishes by Dr. Charles R. Eastman, of Harvard University, 

 Cambridge, Massachusetts; the Ostracoda, Bryozoa, and Hydrozoa by 

 Messrs. E. 0. Ulrich and E. S. Bassler of the U. S. Geological Survey; 

 the Corals by Mr. T. Wayland Vaughan of the U. S. Geological Survey; 

 the Foraminifera by Dr. E. M. Bagg, Jr., of Springfield, Massachusetts; 

 the Angiospermae by Dr. Arthur Hollick of the New York Botanical 

 Garden; and the Thallophyta by Mr. C. S. Boyer of Philadelphia, Penn- 

 sylvania. The remaining chapters have been prepared by members of the 

 Maryland Geological Survey. The Malacostraca, the Cirripedia, the 

 Cephalopoda, the Gastropoda, the Amphineura, the Scaphoda, the Bra- 

 chiopoda, the Vermes, and the Eadiolaria have been studied and described 

 by Dr. G. C. Martin, lately appointed to the U. S. Geological Survey; the 

 Pelecypoda by Dr. L. C. Glenn, now of Vanderbilt University, Nashville, 

 Tennessee; and the Echinodermata by Dr. W. B. Clark, the State 

 Geologist. 



Very large collections of materials were made preparatory to this work 

 and practically every Miocene fossiliferous locality in the State was 

 exhaustively collected from. The long series of bluffs along the Chesa- 

 peake Bay and its tributaries afforded the greatest amount of material, 

 while pits, well-borings, and other exposures, of the strata likewise yielded 



