242 



K. MITSÜKURI : STUDIES ON 



This sticks out with its point from the surface of the skin. 

 Scattered between them, are much rarer, smooth buttons with 

 numerous holes (6). In the pedicels, there are in the lower parts 

 knobbed buttons with sharp pointed processes, the points of which 

 project out from the surface like the spines of the hedge-hog. 



Near the terminal part, the 

 supporting rods are either slen- 

 der and simple or triradiate rods, 

 with one or more of the ends 

 enlarged and perforated (c). 

 Finally, there are many-holed 

 delicate end -plates. 



In its native habitat, the 

 species clothes itself with pieces 

 of shells and stones, which 

 are held on the body by the 

 action of the pedicels. Kept 

 in jars, it throws off these 

 pieces. In the breeding season 

 (the summer) the ripe individuals throw out reproductive elements. 

 The males shoot forth the spermatic fluid, after which the females 

 begin to shed eggs, which easily undergo development under 

 observation. 



Undoubtedly this species is found in other localities of Japan 

 than Sagami Bay. 



Localitij : — Jnpan (v. Marenzeller 1881) ; Sagami Bay ; Prov. Owari. 



Textfig. 47. 



Cucumarh ecMnata : a — Knobljed button 

 with a shaxp iDrocess ; h — Perforatetl plate ; 

 c — Triradiiite supporting rod. ( x 210.) 



59. Cucmnaria japonica Semper. 

 (PI. Vin., figs. 67— G8 ; textfig. 48). 

 Cmumarla japonica Semper 1867— '68, p. 236, Taf. XXXL, Fig. 5 ; Taf. 



