50 -A^rt. 1. — M. i'okoyana : 



Amycla hnrchardi. Danker, Ind. Moll, p. 55, pi. IV, figs. 3, 4. Pilsbry, Catalogue, 

 p. 40. 



Many specimens which invariably belong to the form with a 

 shorter spire like those found in the Lower Musashino. The 

 longitudinal plicae found on the younger or upper whorls are more 

 conspicuous than those on the older. The outer lip is more or less 

 dentate within. The largest specimen obtained measures 17 mil- 

 lim. in height and 8 milhm. in diameter. 



Fossil occurrence. — Shito. Lower Musashino of Miyata and 

 Yokosuka. 



<>î>. ('ol umbel ffi (Afilia) suiifhi, Yokoyama. 

 PI. II. Fig. 24. 



Shell small, subfusiibrm. Whorls nine, the apical ones 

 smooth and rounded, the following somewhat convex with the 

 upper ones more or less longitudinally })licate and the lower ones 

 smooth. Plicae usually about fourteen, straight, obtuse, as broad 

 as interspaces, gradually becoming indistinct and obsolete on the 

 lower whorls, though sometimes more or less visible even on the 

 penultimate whorl. The whorls having no plicae are smooth 

 <3xcept near the upper suture where a spiral thread margins it. 

 This thread is also found at the peripheiy of the body-whorl which 

 is distinctly angulate. Base suddenly contracted, smooth except 

 near the caudal portion which is furnished with several obhque 

 sulci. Aperture sul)quadrangular, more or less resembling a 

 rhombic form. Columella lip Ijent in the middle, with the lower 

 half vertical. Outer lip thin, smooth within. Canal short, recurv- 

 ed. Height 11 millim. Diameter 4.5 millim. Height of body- 

 whorl 6.5 millim. 



This shell is somewhat like (Jolumbelld (Atllia) lischkei Smith 

 (Proc. Zool. Soc. Lond , 1879, p. 207, pi. XX, fig. 41.) which, 

 however, lias the outer lip vai'ieose without and sul)tuberculate 

 within. 



Fossil occurrence. — Otake (immerous), Kamenari, Tega. 



Living. — Central Japan. 



