PLATE X. 
Fig. 1. 
Fig. 2. 
Fig. 3. 
Fig. 4. 
Fig. 5. 
Fig. C. 
Fig. 7. 
Fig. 8. 
Fig. 9. 
Fig. 10. 
Fig. 11. 
Fig. 12. 
Fig. 13. 
Fig. 14. 
Fig. 15. 
Page. 
Zaphrentis robusta, De Koninck 14 
An almost complete corallum seen from the side, x 
Base of Fig. 1, showing cardinal, counter, and alar septa, x 2. 
Calice margin with septa, x J. 
Cyathophyllum? zaphrentoides, Eth. fil. ... ... 21 
Parent corallum, side view, with a young corallite springing from the calice. 
Transverse section of the lower part of the corallum, x 4. 
Transverse section of the upper half of the same, x h 
LopJio2)hijlhr,7n co7'7iiculum, De Koninck ... ... ... 18 
Corallum, side view, x 1-. 
Transverse section of the calice towards its base, with septa, a few dissepiments, 
and the spurious columella, x 2. 
Similar section taken at a lower level, x 2. 
Aidop>hyllum Davidis, Eth. fil., Vur. ... ... ... 23 
Corallum, side view, showing irregular growth. 
Portion of a vertical section, with the three subdivisions of the corallum — outer, 
or interseptal space ; intermediate, or intcrlocular space ; and interlamellar, 
or central area, x 1>. 
Transverse section with similar features, x h 
C yatliophylkmi I’etifoi’me, Eth. fil. 
Transverse section below the calice, x J. 
„ „ at a rather higher level, x J. 
A few septa, highly enlarged, to show the peculiar dissepiments between the 
primary and secondary septa. 
Figs. 1-3, 
from Branxton. 
4-G, 10-15, 
7-9, 
Binge Berry, Bouchel Brook. 
Dungog Hoad. 
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