2G2 



K. MITSUKUKI : STUDIES ON 



Tentacles 15, ending in four fingor-liko processes. Color 

 yellowish-white in alcohol. Longitudinal and circular muscles 

 distinctly recognizable from outside. Calcareous ring as figured 

 by V. Maeenzellek. Eadialia have each two posterior prolongations 

 which do not, however, end in sharp points. Anteriorly, they are 

 two-pointed, one point being broad and blunt and the other sliarp. 

 Near the end of the former there is a slight hollow for the at- 

 taclnuent of longitudinal muscles. Interradialia with one sharp 

 lX)int, much shorter than radialia, Avithout posterior prolongations, 

 Polian vesicle one ; stone-canal one. Tentacular ampullae present. 

 In some specimens the genital papilla can be recognized just out- 

 side the tentacular circle. Calcareous bodies as figuretl by \. 

 ^Maeenzellee. 



Localities : — ^Yellow Sea (v. Makenzelleu '81) ; Japan (LunwiG '83) ; 

 Chefoo (Lampekt '85) ; Hokkaido. 



Genus Trochostoma Danielssen & Koeen 1877. 



67. TrocJtostoiua andamanense Walsh. 



(PL Vn., figs. G4— G5 ; textfig. 53). 



Trochostoma andamanense Wxlsh 1891, pp. 197 — 204. — Koehler & 

 Vaney 1905, p. 90, PI. Xni., figs. 11—15. 



Specimens examined : — 



