67 



pebbles, etc., the same type of soil by the way chos&n by the 

 European and South American species assigned to Aschisma. 

 Hall appears to have noted it in more than one place. His 

 original material is now represented in this country by a specimen 

 at the New York Botanical Garden which had been sent to 

 Austin by Lesquereux, and by specimens in the Sullivant and 

 James herbaria at Harvard University. Professor Farlow has 

 kindly furnished me the following from a letter from Lesquereux 

 found with the Sullivant specimen, dated Jan. i, 1872, the words 

 being quoted by Lesquereux from a letter from Hall: " I am 

 interested in this little moss from the flint pebbles in the Kansas 

 prairies. It grows also a thick leathery confervoid stratum* 

 and is remarkable for affecting only flint pebbles or small flint 

 rocks at their base, forming a thallus or coat frequently all around 

 the stones below." 

 Ithaca, N. Y. 



DESCRIPTION OF A NEW FOSSIL FERN FROM THE 

 JUDITH RIVER FORMATION OF MONTANAj 



By F. H. Knowlton 



Fossil ferns in a fruiting condition are of such comparatively 

 rare occurrence that the finding of a new one is 

 still worthy fo record, and this is the warrant for 

 the present brief notice. The material which has 

 furnished the basis for the following diagnosis was 

 obtained the past season (1914) by Mr. E. Rus- 

 sell Lloyd, of the U. S. Geological Survey, in the 

 so-called Judith coal field of Montana. These spe- 

 cimens are so fragmentary that they would hardly 

 be worthy of more than passing notice if it was not ^''^- ^- ^^y^P- 



for the fact that the fruit is preserved in such a ^ ., . , ' 



'^ sterile pinnule, 



high degree of perfection. The form may be x 3 

 known as: 



* The protonema. 



t Published with the permission of the Director of the U. S. Geological Survey. 



