132 K. MITSUKÜEI : STUDIES OX 



band, of a considerably darker brown color and of a width about 

 J that of the body, runs from the anterior to the posterior end. 

 In this, there are several specially darker transverse areas which, 

 extending laterally outward, appear like large transverse bands. 

 At the outer ends of these bands, or interspersed between these 

 ends, there is on each side of the body an irregular series of 

 seven or eight dark brown spots about 0.5 — 1 cm. in diameter. 

 A large papilla occupies the center of each of these spots. 

 Other papillae which are scattered all over the dorsum have also 

 dark bases, and when contracted, appear to divide the dorsal sur- 

 face into a number of small polygonal areas. In the Shimoda speci- 

 men (No. 1221) which is much contracted, these transverse bands 

 are very conspicuous. They seem to agree with Semper's de- 

 scription. The Ogasawara specimens (No. 1030) arc all much 

 darker, but four or five dark transverse bands can be made out. In 

 the two smallest (4.5 and 5 cm. long) there is a ventral 

 median longitudinal line devoid of pedicels. The specimen from 

 Tomari-mura, Naha, Okinawa (No. 1240, in life 14 cm., now 7.0 x 

 1.6 cm. in ale.) has now on the dorsum a dirty brown color. On 

 this, there are six much darker transverse bands. The whole dor- 

 sum is occupied by larger and smaller mammae-like elevations, the 

 largest of which are nearly 5 mm. in diameter. These elevations 

 are arranged in pairs in six dark bands ; they have each a pa- 

 pilla on top. 

 T^aJs^ /^\ p\ (ï^ fl The cal- 



*JÜ^ (|y^ ^ © II earcou» dc 

 b^~-v£/ c d ^ posits con- 



sist of tables 



Textfig. 23. 



and rods. 



Uololhuria jjervicax : a — Cnlcareous ring ; h — Table ; c, d — Button-like 

 rods ; e— Ordiniiry rcil. (?;— ex4C0). I— Intermdialia ; R— RuliiJia. TllC formcr 



