triphyllous pedicellariæ the valves have only little elongated holes, 

 not presenting the beautiful aspect as the very elongated holes in 

 those of Astropyga. The claviform pedicellariæ are especially large 

 and numerous between the large spines just below the ambitus. — 

 The sphæridiæ are globular, quite smooth. 



The spicules are threeradiate, more or less distinctly arranged 

 in longitudinal series; in the buccal tube-feet they are more irre- 

 gular, in the abactinal tube-feet spicules are totally wanting. 



The colour of the abactinal side is dark violet with the usual 

 blue spots: a series of large, mostly triangular spots down each 

 side of the interambulacral areas, one on each plate, close to the 

 ambulacra, a large spot on each genital plate and some smaller 

 spots spread irregularly over the whole abactinal side. These spots 

 do not continue below the ambitus. The spines uniformly brownish. 

 The actinal side, test and spines, whitish. 



15 Miles W. of Koh Kut, 30 fathoms. 7 Miles N.W. of Koh 

 si Chang, 10 fathoms. Mud. — A small crab was found on the 

 spines in one of the specimens, and a small Cirriped was found 

 fixed to the point of some of the actinal spines. 



Jamiarv tlio 24*'' 19U3. 



