2a. Portion of the same, including the third lobe, enlarged to four diameters. 
The seale-like tubercle is marked in its distal portion by a small umbili- 
coid scar. 
3. Fragment, enlarged to four diameters, showing the scaly phase of cuticle 
below, with large tubercles above. 
4. Cuticle from «convex » surface, enlarzed to four diameters. 
5. Large tubercles with umbilicoid punctiform traces near the distal apices ; 
enlarged to four diameters. 
6. Sealy phase of cuticle next to rounded marginal scale teeth, two of which 
are dividing by fission ; enlarged to four diameters. 
7. Border with scale-tecth succeeding cuticle of the character shown in 
Fig. 4; enlarged to four diameters. 
8. Border with zonate tooth-scales ; enlarged to four diameters. 
9. Portion of border, enlarged to four diameters, from the right of the 
specimen, Plate x, Vig. 1, showing scaly adjacent area, and large tubercles 
farther in. 
10. Border of another segment, enlarged to four diameters. 
Figs. 11, 12. Reinschia australis brasiliensis n. var. 
ll. Vertical section of boyhead, enlarged sixty-five diameters, to show the 
fossil gelosic algae, the golden yellow color of which makes the light portions in 
the photograph. 
The specimen shows the prevalence of larvec colonies. 
12. Horizontal section in the same enlargement, from the same rock 
showing the forms of the hollow thalli, and traces of the thick lateral cell, wells. 
Fig. 13. Reinschia australis Bert. & Ren, 
Vertical section of boghead (kerosene shale) from Elue Mountain, New South, 
Wales, included for comparison. The magnification as in Fig. ll. 
PLATE XII 
Figs. 1-4. Sigillaria (?) muralis n. sp. 
1, Transverse setion. The rounded, squarrose or oval tracheides in wedges 
separated by the «medullary» rays, with but slightly clongated rectangular 
cells. Enlarged fifty diameters. 
2. Tangential section of the same showing abundant rays, and sinuate, 
scalariform tracheides ; a meandering tracheid on the right. Enlarged fifty 
diameters. 
3. Radial section of the same, the scalariform tracheides reticulate in contact 
with the relatively shor; ray cells. The partial destruction of the cell walls 
through bacterial action is in evidence in places near to or in contact with the 
rays. Enlarged fifty diameters. 
4, Portion of the same section enlarged to one thousand diameters to show 
the zone of destruction of the cell walls, the partially destroyed tissue being 
infested with « bacterioids >. 
