114 



conspicuously the largest, though they are little more exsert tban 

 those of the second : they encroach on the columella, while those 

 of the second cycle only just reach it. Those of the third cycle, 

 though a good deal smaller and much less exsert than those of 

 the second, often touch the columella. Those of the fourth cycle 

 are very small and do not descend very far into the calicular 

 fossa. 



The deep-seated columella is prominent and consists of a mass 

 of loosely-twisted lamella?. 



Greatest height of corallum 23 millim. 

 Diameter of calicle 5.5 » 



The unique specimen has its wall ringed about half-way up 

 with four rather large round holes, as if it lodged some com- 

 mensal animal. 



35. Ehodopsammia corniculans n. sp. 



Corallum elongate, gracefully expanding from a slender pedicle, 

 curved or sinuous, compressed, often with buds of the third ge- 

 neration present. Costa? distinct from calicle to base, equal, porous. 

 A fine epitheca extends nearly halfway up the wall, but does not 

 conceal, though it slightly obscures, the costse beneath it. 



Calicle oval, moderately compressed, but not in the least cari- 

 nated at the sides. 



Septa in six systems and four cycles, with a fifth cycle de- 

 veloped in a few of the quarter-systems. Those of the first two 

 cycles, which are equal, are rather strougly exsert, are much the 

 largest, and though they are thin and trenchaut and nearly 

 smooth near their free edge, are very thick and spongy at sum- 

 mit : they reach the columella. Those of the fourth cycle are more 

 exsert than those of the third, in front of which they meet and 

 then join the columella, completely excluding those of the third 

 cycle from the columella. In those quarter-systems in which 

 quinaries are developed these unite with one another, high up in 

 the calicular fossa, in front of the quaternary. 



