FOSSIL ECHINOIDS OF JAPAN. 27 



CIDARIS sp. 



PL II. Fig. 10. 



A very large specimen 28 mm. in greatest diameter near the 

 »summit, club-shaped, abruptly narrowed at the smooth portion of 

 the collar ; granules very numerous, longitudinal striations almost 

 unrecognizable on account of the bad state of preservation. 

 Locality : — 



Itsukaichi, Prov. of Musashi (Jurassic or Cretaceous). 



CIDARIS e sp. 



PL II. Fig. 9. 



Literature consulted: — 



E. Naumann und M. Neumayr, Zur Geologie und Paläon- 

 tologie von Japan. — Denk. Mathem. -Natur wiss. Ciasse 

 Kaiser. Akad. der Wissenschaften, Bd. LVIL, 1890. 



This is a spine broken near the base, club-shaped, 21 mm. 

 in greatest diameter near the base ; the longitudinal striations are 

 very numerous, and their granules close together ; tolerably regular 

 line horizontal striations are traceable on the whole surface. This 

 spine probably belongs to the same species as the specimen already 

 described as a new species of Oidaris by E. Naumann and M. 

 Neumayr. 

 Locality : — 



Yokodaniin Shiraishizawa, Prov. of Tosa (probably Cretaceous). 



