FOSSIL ECHTNOIDS OF JAPAN. 25 



SPINES OF INDETERMINABLE SPECIES OF 

 CIDARIS AND PSEUDOCIDARIS. 



CIDARIS « sp. 



PI. II. Fig. 7. 



Spine about 14 mm. long and 3.5 mm. in greatest diameter, 

 club-shaped, narrowed near the base, where it is quite smooth ; 

 shaft striated with about 9 or more longitudinal bands which are 

 all coarsely granulated ; some striations do not reach the base of 

 the shaft, but are replaced with other shorter bands. Base plain 

 and hollowed. 

 Locality : — 



Iwasa in Tokano, Takaoka-göri, Prov. of Tosa (probably 

 Cretaceous) . 



PSEUDOCIDARIS « sp. 



PI. II. Fig. 11. 



Spine 15.5 mm. long and 12.5 mm. in greatest diameter, pear- 

 shaped, widest at the lower part and acuminated near apex with 

 no narrowed or smooth portion near the base ; longitudinally 

 closely striated, the number of striations being more than 40, 

 and each striation being very closely granulated, so that it is 

 usually impossible to trace the lines of striation near the apex ; 

 granules more than 15 on each striation. 

 Locality : — 



Torinosu in Sakawa, Prov. of Tosa (probably Cretaceous). 



