ACTIXOPODOrs HOLOTHURIOIDEA. 39 



whole body (0.06 — 0,07 mm. in diam.), many of them having one 

 or more cross arms united at the ends and tlins presenting a 

 more or less complete disk-like shape (d, c). End-plates are 

 well developed in pedicels ; they are small in papillae. Nu- 

 merous C- shaped bodies (/', g) are found in the layer below that 

 of the tables (0.08 mm. in largest diam.). They are also present 

 in an immense number in the cloacal wall, and to some extent 

 in the tentacular wall. The bent, toothed or smooth supporting 

 rods (7^) are found in large numbers in the wall of both pedicels 

 and papillae (0.48 mm. long.). 



It seemed to me very remarkable that the present species 

 which has hitherto been found exclusively on the Atlantic coasts 

 of Europe and Africa, should be found here in Japan. I there- 

 fore made a very thorough and careful examination to see if 

 the Japanese specimens did not present some features different 

 from B. tizardi. But I could not find a single point wliich would 

 justify me in putting them in another species or in establishing 

 a new species for them. At the same time, I should like to call 

 attention to the remarkable similarity which a species described 

 recently by Sluiter (Bathyplotes mihicundus) presents to my speci- 

 mens as well as to the description of S. tizardi. Should that 

 Sluiter's species turn out to be identical with the one under 

 treatment, an intermediate station is established for the species, 

 and the occurence of it in Japanese waters may not seem so out 

 of place. 



Locality :— FariJe Channel (Tiikel '82) ; Bay of Biscay (Koehler '95, 

 '96) ; Bergen (Östergren '96) ; Along the Atlantic coast of Morocco, 8ahar;i, 

 Senegal (Perrier 02) ; Sagami Sea. 



