330 BOTANICAL GAZETTE [NOVEMBER 
place have they been found biseriate throughout. The biseriality 
is usually confined to the middle of the ray, although it may also 
occur at one or both ends; often it is confined only to the depth of 
one to three cells. 
C. recentium resembles Dadoxylon antigquum Dawson (Upper 
Carboniferous of Nova Scotia) in the possession of bordered pits 
in one row, but differs from it, among other things, in the possession 
of practically uniseriate rays, whereas D. antiquum has multiseriate 
rays two to four cells wide. D. prosseri Penhallow (Permian, 
Chase County, Kansas) has numerous uniseriate rays (biseriate 
in part), but the bordered pits are smaller, and although they may 
occur in one row on the tracheid walls, are chiefly in two rows. 
Photographic reproductions of transverse, radial, and tangential 
sections of the wood of this species are shown in the accompanying 
plate. 
Jouns Hopkins UNIVERSITY 
Battimore, Mp. 
EXPLANATION OF PLATE XIV 
Fic. 1.—Transverse section, <3. 
Fic. 2.—Transverse section, X 50. 
Fic. 3.—Tangential section, X 50. 
Fic. 4.—Radial section, X 50. 
