1 52 K. MITSUKURI : STUDIES ON 



pill*. They are largest and most developed in the middle 

 part of the body, but become simpler toward the two ex- 

 tremities, and at the very front and posterior ends, are represent- 

 ed by large conical simple papillae. The space between composite 

 papilla} has many wart-like simple papillas, wliich are 2 — 3 mm. 

 across. The whole ventrura is closely beset with largo pedicels, 

 without any arrangement in rows. Kent gives a good photograph 

 of the animal (PI. XXXV., fig. B, named Stichopiis varlegatus by 

 mistake) ; only in my specimens, the large compound papilla3 are a 

 little closer. 



The ground color of the dorsum can best be likened to that 

 of a ripe tomato, being of a peculiar yellowish red color. When 

 kept in a vessel for some time, the yellowish tinge comes to pre- 

 dominate. In the space between large compound papillfe, there 

 are many brown spots which correspond to wart-like simple 

 papilloe. All over the dorsum, on the compound papillae as 

 "veil as in the interspace, there are numerous minute spots, 

 ydlow when living, and whitish in alcohol. They enclose 

 each a minute opuniug and probably correspond to minute 

 papilla?. Between warts, there are seen some irregular blackish- 

 Ijrown streaks which are especially prominent on the side of 

 the body and can be seen best in life. The color and 

 papillae of the dorsum have been recently figured by Sluiter 

 (1901?).). The color of the ventium has a much more 

 reddish tinge than that of the dorsum. The tentacle is 

 yellow. 



Tliere are two kinds of calcareous deposits : ( i ) Slender X- 

 shaped spicules whose ends divide dichotomously once or twice 

 and are produced into long, fine tapering points (textfig. 25c). 

 (ii) Innumerable minute grains (b), which, collected into aggrega- 



