10 K. MITSUKUllI : STUDIES ON 



shreds, exposing the white connective tissue and leiTving the purple 

 epidermis only as spots hero and there on the 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 Paelopalidcs appcmliculata of Theel. It is 

 more by the absence than by the presence of positive characters 

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

 whicli lias great weight in my own mind. The " Challenger " 

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

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

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

 had been caught by the " Challenger." 



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

 been about 25x1- cm. At present they are 12 x 3.5 cm.; 9.5 X 

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

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

 to count the tentacles exactly, but there are i:)robably 20 of 

 them. 



On the ventral median amlndacrum, there are pwiirs of large 

 pedicels. These are jiresent throughout nearly the entire length. 

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

 sixth of the length. On the 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 (jf the body, 

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

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

 aroand the body ; at the anterior end, the row goes across to the 

 other side dorsally to the mouth (10 — 20 papillae in tliis part), 

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



