30 
perature until as late as Tertiary times, but several minor facts 
have recently received attention which would seem to qualify any 
such general conclusion. The geologists, for instance, insist 
upon the evidence of the existence of an ice age during the Car- 
boniferous Period, and the present distribution of our alpine and 
boreal plants prove to be a stumbling block every now and then 
to those who think that they have reached definite conclusions in 
regard to plant life and the conditions surrounding it just prior to 
the Glacial Epoch. In regard to this latter part of the subject— 
plant distribution—the botanist, has something to learn from the 
geologist and vice versa, and several errors might have been spared 
each had they recognized this fact. The subject is one which has 
received more or less attention lately, and is sure to receive consid- 
eration for some time to come, and we earnestly commend some of 
the references here given to the careful consideration of all who 
are interested in such discussion. 
As a useful compend of diverse views the work is invaluable, 
and the exhaustive bibliography which is appended will save 
future students an immense amount of labor. This wealth of 
reference is confusing, however, especially as the author contrib- 
utes nothing new in the line of original investigations or conclus- 
ions, and the reader is inclined to lay down the work finally with 
the impression that there is a hopeless disagreement between au- 
thorities on the subject of past climatal conditions on the earth as 
evidenced by plant remains. Hee se 
Uecber Boehmische Kreidepflanzen. Hermann Engelhardt. (Natur- 
forsch. Gesellsch. d. Osterlandes, Neue Folge, Band v. 86-118 
Taf. I.) 
This supplements in a pleasing manner Velenovsky’s work in 
the same horizon, and adds not a little to our knowledge of the 
universal vegetation which flourished throughout the world in 
Cretaceous times. Many species identical with those from the 
Western Continent may be noted, and the author describes and 
figures as new Sphaeroccites Laubei, Litsaea Bohemica, Callistem- 
ophyllum Bouderi, Sterculia sp. (allied to S. aperta, Lesqx.) and 
Pinus sp. Aue. 
