317 
made by means of an examination of the fossil flora. The species 
determined number 123: Fungi, 2; Ferns, 70; Calamariae, 14; 
Sphenophyllae, 5 ; Lepidodendrae, 13; Sigillariae, 6; Taeniophyl- 
leae, 2; Gymnosperms, 10; doubtful, 1. 
It is of interest to note that the one species of doubtful classifi- 
cation is Palacoxyris which is placed under Animalia (?) A table 
of distribution is given for such species as occur in other Ameri- 
can coal basins, also tables showing distribution of the same or 
closely related species in Great Britain and Franco-Belgium. 
The conclusions from such comparisons are that the coals in 
question are about the horizon of the Lower Kittaning of the bi- 
tuminous series of the Marcy (D) coal of the northern anthracite 
field of eastern North America, the middle and upper coal 
measures of Great Britain and the upper zone of the Valenciennes 
series, the Geislantern beds of the Saarbriick series ‘of the Rhenish 
coal regions in the upper part of the Schatzlar series and in the 
Radnitz series of central Bohemia. 
re: 
An Illustrated Flora of the Northern United States, Canada and the 
Lritish Possessions, from Newfoundland to the parallel of the 
southern boundary of Virginia, and from the Atlantic Ocean 
westward to the 102d meridian. By Nathaniel Lord Britton, 
Ph.D., Emeritus Professor of Botany in Columbia University 
and Director-in-Chief of the New York Botanical Garden, and 
Hon. Addison Brown, President of the Torrey Botanical Club. 
In three volumes. Volume II. Royal 8vo. Pp. 643. New 
York. Charles Scribner’s Sons. 1897. Price per volume, 
$3.00. 
The second volume of this admirable work, which has just been 
issued from the press, will be gladly welcomed by all those who 
have made the acquaintance of the first one. In accurate typog- 
raphy, as well as in the keys, descriptions and illustrative figures 
of the species, it is fully up to the high standard of its predecessor, 
so well and thoroughly reviewed by Dr. Rusby in the BULLETIN 
of September, 1896. 
The families contained in it occur in the following order : 
