PLATE I. 



Fig. I. Stylaster eximiits fac. altus. x i'/j- Part of a colony. Specimen crowded with ampullae (amp.). 

 Fig. 2. Stylaster eximius fac. altus. < 20. Showing the side view of the small kind of cyclosystem. 

 Fig. 3. Stylaster eximius fac. altus. X 20. Drawn after calcining the coral. Superficial view of the same 



cyclosystems, showing the completion of the cycle of dactylozooids. 

 Fig. 4. Stylaster eximius fac. dentatus. X 2. Part of a very old colony, the surface of which shows crowded 



tuberculate prominences — the ampullae. 

 Fig. 5. Stylaster eximius fac. dentatus. X 23. The extremity of a branch from the same, showing ampullae 



(amp.). 

 Fig. 6. Stylaster eximius fac. dentatus. X 2. A young colony. The surface is much smoother than in the 



previous specimen, owing to the relative scarcity of the ampullae. A sketch of a magnified branch 



of this facies would closely resemble Fig. 5. 

 Fig. 7. Stylaster eximius fac. minor. ■ 2. Part of a white colony. One of the side branches lias grown 



against a sponge (spo), forming a thin layer over its surface. The pink colonies of this facies 



are usually more regularly nabellate, than the white ones. 

 Fig. 8. Stylaster eximius fac. minor. X 20. A small portion of the pink variety, showing ampullae (amp.) 



and spines (sp.) on stem and ampullae (probably Q). 

 Fig. 9. Stylaster bilobatus sp. n. x 2. A fragment. Pink variety. Showing ampullae (amp.) at the base of 



many of the cyclosystems. 

 Fig. 10. Stylaster bilobatus sp. n. ■ 20. White variety. Showing the bilobed character of the cyclosystems. 



Some specimens are thickly covered with smaller spines. 

 Fig. 11. Stylaster multiplex sp. n. / 2. Whole colony. Showing the arrangement of the branches in 



several parallel planes. 

 Fig. 12. Stylaster multiplex. X 17. Showing the cyclosystems inclined towards one surface and ampullae 



on both surfaces, always near a cyclosystem, and dactylozooids (dac.) partially contracted. 



gast.p. = gastropore broken across; it is deep. 



