10 K. MITSUKUIU : STUDIES ON 



shreds, exposing the white connective tissue and leaving the purple 

 epidermis only as spots here and there on tlie surface. These 

 purple points on the white surface form the striking feature of 

 the specimens preserved in alcohol. 



It is therefore with a great deal of hesitation that I identify 

 these specimens with Paelopaiklcs appencllculata of Theel. It is 

 more by the absence than by the presence of positive characters 

 that I place these specimens in this species ; but there is one fact 

 which has great weight in my own mind. The " Challenger " 

 specimens were obtained at a spot very near Suruga Bay, where 

 all my specimens were obtained. It would not liave been at all 

 strange if the same species as tliat which abounds in that bay 

 had been caught by tlie " Challenger." 



The specimens, when fresh, are stated by Aoki to have 

 been about 25x12 cm. At present they are 12 x 3.5 cm. ; 9.5 X 

 3.7 cm. ; 9x4 cm. The two extremities are rounded. The 

 mouth is ventral and the anus dorsal. I have not been able 

 to count the tentacles exactly, but there are probably 20 of 

 them. 



On the ventral median ambulacrum, there are pairs of large 

 pedicels. These are present throughout nearly the entire length. 

 There are about 17 pairs, but they are absent on the anterior one- 

 sixth of the length. On tlic outside of the median row and about 

 midway between it and the lateral edge, there is on each side a row 

 of large pedicels which extends over the posterior half of the body, 

 but is lacking on the anterior half. Outside of this row and on the 

 lateral body edge, a single row of large papillae goes entirely 

 around tlie body ; at the anterior end, the row goes cicross to the 

 other side dorsally to thu mouth (19 — 20 papillae in this part), 

 and at the posterior end, ventrally to the anus. This is all that 



