16 art. 1?. — s. tokunaoa : ox the 



Localities : — 



Mizulio-mura in Minamitsuru-göri, Prov. of Kni (Miocene) 

 (coll. T. Hirabayashi and S. Tokunaga) ; Hatto near Kelung, 

 Formosa (Miocene) (coll. S. Tokunaga) ; Iriomoto-jima, Loochoo 

 Is. (Miocene) (S. Tokukaga). 



ILARIONIA YOSHIWARAI P. de Loriol. 



Literature consulted : — 



P. de Lor [OL, Notes pour servir a l'étude des Échinodermes, 

 II. série, Fase. L, 1902. 



The genus lias hitherto been restricted to the Eocene of 

 Europe and Sind (Asia). 

 Locality : — 



Nishi-ura in Haha-jima, Bonin Is. (Eocene) (coll. S. 

 Tokunaga). 



PYGURUS ASIATICUS Tok. 



PI. III. Figs. 3-6. 



Length ant. Length post. Distance of apical sys- Distance of peristome 

 Length. Width. Height, paired petal, paired petal, tern from the ant. edge, from the ant. margin. 

 88 mm. SO mm. 03 mm. 4G mm. 52 mm. 30 mm. 20 mm. 



00 mm. 00 mm. 44 mm. (?) 28 mm. (?) 



Test large, with undulating marginal outline, grooved an- 

 teriorly and broadly ridged posteriorly ; very highly conical, 

 concave actinally. 



Apical system at the conical apex, eccentric in front. 



Ambulacra flush dorsally, unequal ; open petaloid part lance- 



