FOSSIL ECHINOIDS OF JAPAN. 17 



olate, tending to converge on the extremity, and continued over 

 the margin as narrow lines of small pores in pairs ; the greatest 

 width of this part in a specimen having a diameter of 88 mm. 

 measured at about i distance from the apical system to the ex- 

 tremity, and respectively 7 mm., 11.5 mm., and 10.5 mm. in the 

 odd, anterior paired and posterior paired ambulacra; poriferous 

 zone about 3.5 mm. wide in the paired ambulacra, which is about 

 * as wide as the width of the whole petal ; pores very nume- 

 rous, about 90 in the anterior paired ambulacra in the petaloid 

 part ; width at the extremity of the petaloid part only 3.5 mm. 

 in the paired ones ; narrow lines of pairs of small pores passing 

 over the ambital margin and continued to the peristome ; ambula- 

 cral portion of the actinal side deeply and broadly grooved. 



Peristome eccentric, pushed anteriorly ; periproct close to the 

 posterior edge of the actinal side of the test. 

 Locality : — 



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

 (coll. B. Kotô). 



ECHINOLAMPAS YOSHIWARAI P. de Loriol. 



Literature consulted : — 



P. de Loriol, Notes pour servir a l'étude des Echinodermes, 

 II. série, Fase. I., 1902. 

 Locality : — 



Kanaya, Prov. of Kazusa (Pliocene) (coll. S. Hatta & S. 

 Tokunaga). 



