No. 387.) REVIEWS OF RECENT LITERATURE. 277 
comparatively low form, in which the stem is commonly as broad as 
Of twenty-one species distinguished all but one are new. 
De Pak: 
GEOLOGY. 
Maryland Geological Survey. — The two handsome volumes, of 
which the second has quite recently been issued, representing the 
first publications of the Maryland Geological Survey,’ under the 
direction of Prof. William Bullock Clark of Johns Hopkins Univer- 
sity, are a credit to the Maryland Commission, and show clearly the 
advantage enjoyed by the Maryland geologists in their proximity to 
the offices of the federal Survey at Washington, and in their imme- 
diate association with the scholarship of Johns Hopkins University. 
A cursory examination of these volumes shows that the functions of 
a State Survey for the people of the state, in giving to them accurate 
information concerning maps, economic products, and topographic 
advantages, are distinct from those of the federal Survey, while at 
the same time it is very evident that codperation with the United 
States Geological Survey is essential to such work. In the establish- 
ment of this Survey the legislature acted wisely in appointing the 
presidents of the two leading colleges members of the Commission ; 
and the eleventh Resolution of the Commission, asking official 
cooperation from the head of the United States Geological Survey 
and from the directors of the geological surveys in neighboring states, 
has had much to do with the high grade of work shown by the Survey’s 
first publication. For the execution of this work unstinted praise is 
due to Professor Clark and his assistant, Dr. Mathews. 
In the first volume, “issued to set forth the organization of the 
Survey, and to show what has hitherto been done in the study of the 
geology, natural history, and resources of Maryland,” the plan of 
operation of the Survey is stated concisely; a very complete state- 
ment of the physiography, geology, and mineral resources of Mary- 
land has been compiled by Professor Clark, with a most scholarly 
historical sketch of earlier investigations. Dr. Mathews contributes 
a bibliography and cartography of Maryland, which is one of the 
most complete of its kind that we have seen. It is arranged in 
chronological order, and includes works from 1526 to 1896 inclusive, 
1 Maryland Geological Survey, vol. i (1897), 539 pp-; vol. ii (1898), 509 pp., 
plates and maps. Baltimore, The Johns Hopkins Press, 1897-98. 
