PLATE CLXXVIII. 
INTERNAL STRUCTURE OF Fossin Woop From THE CycaD BED OF THE 
Freezeout Hiiis, Carson County, WYoMING, AS SHOWN BY SEc- 
TIons MADE FROM No. 500.85 oF THE MusEUM OF THE UNIVERSITY 
oF WyominG. 
Figs. 1-6. ARAUCARIOXYLON ? opsctRUM Kn. u. sp 
Fig. 1. Transverse section, showing the uniform and thick-walled wood 
cells. x 320. 
Figs. 2, 4,5. Radial sections, showing the bordered pits in scattered or con- » 
tiguous rows. x 320. 
Fig. 3. Tangential section, showing a single medullary ray. x 320. 
Fig. 6. Radial section, showing medullary rays and wood cells with remote 
bordered pits. x 320. 
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