102 
four different areas, viz: Connecticut Valley, New Jersey and — 
Pennsylvania, Virginia, North Carolina and Western. One hun- 
dred and nineteen species have been named, of which only thirty- 
four are common to two or more of the areas. The numberof 
species common to the several basins are arranged in tabular 
form, so that the distribution may be seen at a glance. Fromit 
we may learn that the only two species which occur in both the - 
eastern and western areas are Cheirolepis Miinsteri and Palissya 
Braunii. There is also a table showing the percentage of com- 
mon forms to the total number of forms in each area. The artl 
cle ends with an attempt to correlate the American and foreign 
strata and the result is such as to show the importance of paleo- 
botany in this connection. A complete list of the Americat 
Triassic species would not have made the article unwieldy, and 
while the author’s object is accomplished without such a list, its 
addition would have been both of interest and value. : 
A. H. 
Physalis, or Husk Tomato. (Cornell Univ. Agric. Ex. St. Bull 
XXXvii, 381). ? 
Descriptions and figures of Physalis pubescens, P. Peruvian, 
P. capsictfolia and Solanum muricatum. 
Principles and Methods of Geologic Correlation by Means of Fos- 
stl Plants. L. F. Ward. (Reprint Am. Geol. ix. 35-47): 
The importance which paleobotany has assumed in the ei 
termination of the age of strata is dwelt upon. The author cites 
as an illustration the clays of Gay Head, Mass., which had been 
announced by stratigraphical geologists at one time OF another 
to belong to the Miocene, Pliocene and even Quarternary age: 
Recent discoveries of fossil plants, however, show that at least 4 
part of the strata are undoubtedly Cretaceous, as many of st 
leaves are identical with those from the Amboy Clays of New 
Jersey. The author incidentally raps the botanists, who, 
says, are so accustomed to have the entire structure of 4 plart 
for study that they have no patience with the mere fragment 
upon which the palzobotanist often has to rely for determinatio? 
He claims that the necessary close study of these fragments i 
so sharpened the powers of observation in the latter that the 
are now able to act the part of teacher to the botanists. Thus 
