44 Art. 1. — M. Yokoyama : 



deep, ruunded and wide-mouthed. Heigiit (S.") millim. Diameter 

 3 millim. 



Fossil occurrence. — A single specimen from Shisui. 



Genus HKI.A (Ijeacli), Gray. 



40. Jtelfi ruf/it/afn, Tfosche/, i'<ir. selitieifïeri, Hanuer. 



PI. I. Fii--. 37. 



Bela nigulata rar. achneiileri. Hanner, Plioe. Moll. Gvt. Ikit., part II, ,p. 284, pi. 

 XXXI, figs. 15, 16. Palaeontogr. Soc. LXVIII. 



The shell is rather small, ovato-fusiform in shape, with the 

 spire ahout liali as long as the hod3'-whorl. The whorls number 

 between six and seven and are angulate a little above the middle, 

 the surface above the angle forming a sk)ping slielf. The sculpture 

 consists of longitudinal ribs and spiral threads, the former being 

 about sixteen on tlie body-whorl, somewhat narrower than the in- 

 terspaces and nodulous at the angle. The spiral threads number 

 five, one at, and four below, the angle and slightly tuberculous at 

 their points of intersection witli the ri!)s. Above the angle there 

 are several tine spiral striae. On the body-whorl the spiral threads 

 increase in number to about twenty, are rather unequal and often 

 at unequal distances. Aperture longly ol)Ovate. Height 9 millim. 

 Diameter 4 millim. 



The two specimens which were obtained are most like the 

 al>ove species of the English Crag with which I do not he.-^itate to 

 unite them. 



The typical form of Bela rugulata Tr. is now living in the 

 boreal seas. 



Fossil occui'rence in Japan. — Otake. 



Fossil occui'rence in foreign countries. — Coralline Crag, Wal- 

 ' Ionian, Newl)ournian, Butleyan and Icenian of England. 



41. Ret (I reetieostulafa, Yokoyama. 

 PI. I. Fig. 38. 



Shell fusiform. Whprls convex, longitudinally ribbed and 

 spirally striate. Kibs about seventeen on the penultimate whorl. 



