ß08 s. GOTO : 



dried specimens are all dark brown in colour, but the alcoholic 

 one is ahnost colourless with a very slight tinge of brownish yellow. 

 The surface of the body is entirely covered over with fine gran- 

 ules, which are coarser along either side of the ambulacral furrows 

 as well as on, and in the vicinity of, the mouth- plates. Beneath 

 the surface granules is a thick leathery skin, which becomes hard 

 on drying. On the abactinal side of the disk, close to the centre 

 is the anus, which can be detected at once by the presence of 

 coarse granules around it. The papular pores are very small 

 and form patches, which are present on the abactinal and lateral 

 sides of the whole disk and the basal half of the arms. These 

 papular patches are generally roundish in shape, and two or three 

 of them may unite and form compound ones. The number of 

 pores in a single patch varies considerably according to its size, 

 from half a dozen to sixty or more being present in each. On 

 the actinal side the papular pores are entirely absent, but there 

 are many not very distinct grooves running parallel to one another 

 and transversely to the ambulacral furrow and reaching out to 

 the papular areas of the sides of the arms (PI. XVIII, fig. 265). 

 I have counted as many as eleven of these grooves on one side 

 of an arm. They appear to have no definite relation to the ad- 

 ambulacral plates or any other structures visible on the surface. 

 In the interradial Hue the grooves of the neighbouring arms a butt 

 against each other, and leave a triangular space corresponding to 

 each pair of mouth-plates. 



The adambulacral plates are not visible from the surface, 

 but the armature is very distinct and characteristic. As describ- 

 ed by LüTKEN the spines of these plates are arranged in two 

 series, but they also carry pediceUaria», a fact which was over- 



