99 



The pali, which are 24 in nuraber, are thick, creuated, sub- 

 prisoiatic pillars, placed in two crowns opposite the septa of the 

 first three cycles, and particularly well delimited both frora the 

 septa aud front the columella. 



The columella, which is uot deep-seated, consist of a large 

 nuuiber (about 40 iu the unique speciuieu) of small granular 

 discrete pinnacles. 



The septa of the first two cycles are purple-brown, those of 

 the two iuferior cycles are white tinged with purple-brown at the 

 edge: the pali and the pinnacles of the columella are snow-Avhite. 

 Height of corallum 20 millim. 



Diameter of the circular calicle 11 » 



14. Deltocyathus lens n. sp. 



Corallum onion-shaped or lentiform. Costae all equal and all 

 distinct from calicle to base, sharply salient and elegantly serrulate. 



Septa elegantly echinulate, in six regular sy sterns and four 

 complete cycles: the primaries, which are the largest and most 

 exsert, reach the columella; the quaternaries unite with the ter- 

 tiaries near the calicular margin, and the tertiaries with the se- 

 condaries near the columella. 



At first sight the pali seem to be in a single crown situated 

 opposite the secondary septa, but broad paliform lobes are also 

 present opposite the tertiaries at the point where the quarternaries 

 unite with them. The pali opposite the primaries are small den- 

 ticles not distinguishable from the columella. 



The columella consist of eight or ten denticles including those 

 opposite the primary septa, which perhaps are pali. 

 Height of corallum 3 millim. 

 Diameter of disk 5 » 



15. Deltocyathus fragilis n. sp. 



Corallum saucer-shaped, of a thin vitreous texture, its margin 

 rather raggedly scallopped by the slightly exsert septa and eostee. 



