‘ Bars of Sanio ’ in the Conifer ales. 
12 
Summary. 
1. Bars of Sanio occur in thirty-five of the living genera of the 
Coniferales. 
2 . They do not occur in two genera of the living Conifers, namely, 
Agathis and Araucaria. 
3. This distribution is confirmed by fossil evidence which shows the 
bars to be absent in Conifers of Araucarian affinities. 
4. The presence of bars of Sanio is of practical use as a diagnostic 
character for fossil woods. 
In closing the writer wishes to express her thanks to Prof. E. C. Jeffrey 
for his helpful advice, guidance, and generous provision of material. 
DESCRIPTION OF PLATE XIII. 
Illustrating Miss Gerry’s paper on the 1 Bars of Sanio 
Fig. 1. Radial section of the wood of Abies balsamea. x 180. 
Fig. 2. Radial section of the wood of Podocarpuspolystachya. x 500. 
Fig. 3. Radial section of the wood of Microcachrys tetragona. x 500. 
Fig. 4. Radial section of the root of Saxegothea conspicua. x 500. 
Fig. 5. Radial section of the wood of Thuja plicata. x 180. 
Fig. 6. Radial section of the wood of Araucaria imbricata. x 180. 
Fig. 7. Radial section of the wood of Brachyoxylon. x 180. 
Fig. 8. Radial section of the wood of Araucaryopitys americana. x 180. 
Fig. 9. Radial section of the wood of Prepinus statenensis. x 500. 
Fig. 10. Radial section of the wood of Pityoxylon (undescribed), x 180. 
Fig. 11. Radial section of the wood of Pityoxylon scituatense. x 500. 
Fig. 12. Radial section of the wood of Sequoia Penhallowii. x 500. 
