JAPANESE ASTEROIDEA. 659 



plates near the centre of the body bear each 5-7 sharply pointed, 

 slender spines nearly always arranged in a single row, but some- 

 times with two or three spines outside the row. The spines at the 

 centre of each plate are longer than the others, so that in the 

 more peripheral plates with only three spines the middle one is 

 longer than the other two. The ventrolateral plates are arranged 

 in regular rows parallel to the ambulacral furrows, except near 

 the mouth where this arrangement is more or less obscured. The 

 plates occupying the very margin of the body do not present any 

 distinctive features. 



I have a single specimen of this species from Misaki, of 

 wliich the dimensions are r=16 mm., K=22, R : r=1.4. The speci- 

 men wliich is in alcohol is colom^less, except where the stomach 

 shows thi'ough. 



Type specimen in S. C. 



Pahnlxws petaloides, u. sp. 



(PI. XIX, figs. 284-285.) 



The general outline of the body is like that of Palmipes- 

 memhranaceus. The body is very tliin and when it is entirely 

 flattened out, the arms are very broad and the interradial indenta- 

 tions very shallow ; but when it is curved towards the actinal 

 side, as appears to happen often in alcoholic specimens, there is 

 formed a more or less distinct notch in the interradial Hne, as is 

 also suggested to occur in P. memhranaceus in Ludwig's figures 

 ['97, PI. 5]. Most of my specimens were originally preserved in 

 formahn and they were then hght brown on the dorsal side and 

 colourless on the ventral. On the dorsal side a central pentagon- 

 al area can be distinguished, as in Palmipes tenuis, in which the 



