120 



Those of the first cycle are the highest and largest and form with 

 their costse the rays of the star. Those of the 2 nA and 3 nd cycles 

 are about equal to one another and unite near the columella. 

 Those of the 4 th cycle are free and do not reach the columella. 

 The edges of all the septa are ragged and their surface is echi- 

 nulate. 



As the margin of tbe hexagonal disk is somewhat concave be- 

 tween the free ends of the ray-like primary septa, the septa of 

 the second cycle are the least exsert of all but the quaternaries 

 that lie next them on either side. 



Ragged paliform teeth are present in front of all the septa 

 except those of the lowest cycle. 



The columella consists of a tortuous network of crisply granu- 

 lar pocesses. 



Maximum diameter of disk 12 millim.; span of corallum be- 

 tween the tips of two opposite spokes 21 millim. 



Like Odontocyathus sexradiis, this species very strongly resem- 

 bles Stephanotrochus tatei Dennant, but is flatter than the latter 

 species and has very much larger primary septa. 



7. Flabellum Suluense, n. sp. 



Corallum compressed, shaped like a nearly full-spread fau, with 

 the ends concave and the faces flat. Remains of a pedicle of at- 

 tachment are present. The costse are mere strise. The margin of 

 the calicle jagged. 



The septa are in six systems and five complete cycles ; their 

 surfaces have the usual rows of discrete granules. Those of the 

 first three cycles are equal and alone form the columella: their 

 vertical margins are very strongly sinuous. Those of the fourth 

 cycle descend as low as the columella. Those of the fifth cycle 

 do not descend half-way down the calicle. 



Colour pale cinnamon, somewhat streaky. 



Height of corallum 15 millim.; major diameter of mouth of 

 calicle 23 millim., minor diameter 10 millim. 



