158 The American Naturalist. [February, 



Prizes of the London Geological Society for 1891.— The 

 medals and funds to be given at the anniver.-ary meeting of the Geo- 

 logical Society on February 11), have been awarded as follows:— The 

 Wollaston medal to Baron Ferdinand von Richthoi'en ; the Murchi- 

 son medal to Professor A. H. Green, F. R. S.; and the Lyell medal to 

 Mr. George H. Moreton. The balance of the proceeds of the Wollas- 

 ton Fund to Mr. O. A. Derby; that of the Murchison Fund to Mr. 

 Beeby Thompson; that of the Lyell Fund to Mr. E. A. Walford and 

 Mr. J. W. Gregory, and a portion of the Parlow-Jameson Fund to 

 Prof. C. Mayer-Eymar. 1 Geo]. Mag. Feb.. 1 >'.»!'. 



Interval Between the Glacial Epochs.— In the Bull. Geol. 

 Soc. Am., April, 1890, Mr. T. ('. Chamberlin presents additional evi- 

 dences bearing upon the interval between the (.laeial Kpochs; viz. 



the valley 

 Allegheny 



