20 art. 12. — s. tokünaga : on the 



Localities : — 



Kanazawa, Prov. of Kaga (probably Pliocene) (Mus. Sc. Coll. 

 Tokyo) ; Sakae, Prov. of Shinano (probably Pliocene) (Mus. Sc. 

 Coll. Tokyo) ; Ikari, Prov. of Shinano (probably Pliocene) (Mus. 

 Higher Normal School Tokyo) ; Tsurushi and Hazzaki, Prov. of 

 Hitachi (Pliocene) (coll. C. Kochibe) ; Hidaka-mura in Kami- 

 mizuta-göri, Prov. of Shinano (probably Pliocene) (Tokyo Imp. 

 Hous. Mus.) ; Anrakujô-mura in Mogami-göri, Prov. of Uzen 

 (Pliocene) (coll. K. Inoue) ; Asahigawa-mura in Minamiakita- 

 göri, Prov. of Ugo (coll. D. Satô). 



SCHIZASTER RECTICANALIS Yosh. 

 PI. IV. Figs. 1-3. 



Literature consulted : — 



S. Yoshiwara, On some new Fossil Echinoids of Japan. — 

 Journ. Geol. Soc. Tokyo, Vol. VIII. No. 65, 1899. 



Test thick, cordiform, angular, posterior side not so elongated 

 as in many other species ; anterior groove shallow. 



Apical system almost central ; from the vertex situated behind 

 the apical sy.stem the test curves suddenly to the truncated 

 posterior extremity. 



Odd ambulacrum very wide and shallow with about 23 small 

 double pores. Antero-lateral ambulacra broad having about 35 

 pores, almost straight, not closed at the extremities, and very 

 long, reaching almost to the ambitus ; postero-lateral ambulacra 



