22 Alt. 1. — M.Yokoyau.a: 



tlian tlie first and weakly tuberculate only on the upper whorls. 

 The tliird cord is about as broad as the second, and on the whorls 

 near the body-whorl often splits into two by an impressed spiral 

 line which appears in the middle of the cord. The three further 

 cords which are still present are narrower. The impressed spiral 

 lines separating the above cords are punctate. The base of the 

 shell is contracted quite abruptly, giving rise to a bluntl}^ anguiate 

 periphery. 



Pilsbry in describing his specimens states that the height is 

 more than five times the diameter. In the four examples which 

 were obtained, it is only four times and a half. The largest 

 example measures 30 millim. in height. 



Fossil occurrence. — Otake. 



r.iving. — Central and Western Japan. 



21. Ter ehr €1 recficostafa, Yokoyama. 

 Terebra recticostata. Yokoyama, Foss. Minra Penin., p, 32, pi. I. fig. 11. 



A single specimen, 23 millim. in height and 5.5 millim. in 

 diameter. The ribs are not so sharp and strong as in the speci- 

 mens found in the Lower Musashino. 



Fossil occurrence. — Shisui, Lower Musashino of Naganuma. 



22. Terebra ehihana^ Yokoyama. 

 PI. I. Fig. 20. 



Shell subulate. Whorls about fifteen, shghtly concave on the 

 upper third and a trifle convex on the lower two-thirds, longitudi- 

 nally pUcate and spirall}' striated. Plicie often weak and indistinct, 

 about twelve on the penultimate whorl and somewhat curved with 

 the concave side towards front. Spiral striae about six in number, 

 with the uppermost at a little distance from the suture and 

 provided with a small tubercle at the point of intersection with the 

 plicae and separated from others by a wide smooth space occupying 

 the concave portion of the whorls. Of the remaining five striae, 

 the third is the most conspicuous, being found on the most convex 



