110 K. MITSrivURI : STUDIES ON 



pedicels into three zones if the mediau lino is absent, or into fom' 

 zones if this is present. In the latter case, each zone consists 

 of about four rows of pedicels ; in the former case, the 

 median zone of pedicels is the broadest of the three, having 

 7 — 10 pedicels across. In certain specimens the pedicels are 

 apparently scattered all over the ventrum without any of the 

 clear lines just mentioned. It is more than probable that the 

 division of the pedicels into zones by the clear lines is most 

 conspicuous in the younger specimens. 



Color of ventrum always lighter than that of dorsum, — 

 either almost white or tinged with a light straw yellow. The 

 bases of pedicels are surrounded by a dark brown, the basal 

 parts of each pedicel being also similarly colored. 15eyond this, 

 the tip of the pedicel is yellow. The ground color of the dorsum 

 is generally a very light brown. There is a dificrence in shade 

 in diflcrent individuals, those from the deeper waters seeming to 

 bo generally darker. In one specimen, there was a slight gi'eenish 

 yellow tinge to the ground color. Numerous dark brown spots 

 mark the bases of dorsal i)apilla\ Although these spots are 

 generally scattered without any order, those on the lino, or just 

 outside the line, of the inner series of tubercles on each dorsal 

 radius are often arranged more or less in a longitudinal line ; and 

 furthermore as the outer aspect generally, or sometimes all of 

 the adjacent largo tubercles, are colored with more or less con- 

 spicuous large brown patches, this line stands out prominently ; 

 and when the general view of the animal is taken from a distance, 

 it looks like a streak of dark brown on cacli side of the body. 

 This efiect is heightened in most specimens by the presence, just 

 outside the line, of a more or less clear longitudinal streak which 

 is devoid of brown spots (this streak corresponds to the line of the 



