K. MITSUKUIU : STUDIES ON 



Textfig. 8. 



Srtthyplote.1 Hznrdi : «-Riidialiii of calcareous riug ; 0, c— Tables £rom jiosterior region ; 

 d, e — Same oC ventrura ; /, ;/— C-shaped bodies; A— Supporting rod. {h — /jxSOO). 



have a rather largo mamma-sliapcd liasc. from tlic top of wliicli 

 a slender pajiilla arises. These slender jwirts are H —(5 mm. long 

 in their present contracted state. 



Month ventral ; aims subdorsal or tcrniin;d. Tentacles 18, 

 sometimes only 15. (Icnital bnndles two. I'olian vesicle one, large 

 and long (1 cm.). In one s})ecimen I made out radialia in the cal- 

 careous ring to 1)0 of the shape sliown in textfig. S n. InteiradiaJia 

 and stone-canal not made out. Longitudinal muscles undivided. 



The calcareous deposits consist of cross-shai)e(l tables and 

 ('-sh;i.i)ed bodies together Avith supporting rods. The tables in the 

 posterior parts of the Itody are very robust and thick, measuring 

 0.17 — 0.23 mm. in diam. {h, c). They are rarely five-radiate. 

 Spires thick and short, and liave a crown-like enlargement, which 

 in some cases seem to be without any central opening. The 

 tables of the ventral surface are ordinarily the smallest in the 



