28 
The previous records are in the much disputed Black Buttes beds of 
Wyoming, of post-Laramie age, and in the Hanna formation of Wyoming. 
Occurrence, Ravenscrag beds, Ravenscrag butte, near centre of 
sec. 27, tp. 6, range 23, W. 3rd mer. 
Phyllites aquaticus Berry n. sp. 
Plate V, figure 5 
Several specimens of a delicate plant are contained in the collection 
from the Ravenscrag beds. They represent filiform stems with whorls of 
slender linear leaves at the nodes. These are lax, with one to three longi- 
tudinal veins, and are about 0-5 mm. in width and preserved for lengths 
up to 2 cm. None has been observed to branch but whether their distal 
parts were branched as in Ceratophyllum is not known. One slab of 
material shows a whorl on each side and appears to have been a part of the 
same stem. If this is so then the plant was rapidly buried in place and the 
internodes were relatively short. The material is evidently not algal, but 
a vascular plant. 
