Fossils from the Miura Peninsula and its Immediate North. 53 



the figures given by Tryon. The number of peripheral tubercles 

 is eleven on the body-whorl. The shell is thick and solid. 



Fossil occurrence. — Miyata Zone (Shimo-Miyata). 



Living. — Japan (A. Adams): New Zealand. 



41. Siphonalia spaclicea, (Reeve). 

 Pl. III. Figs. 8, 9, 10, 11. 



Siphonalia spadicea. A. Ahaus, Ann. Mag. Nat. Hist., 1863, vol. XI, p. 203. Smith, Proc. 

 Zool. Soc, 1879, p. 205, pl. 20, tig. 38. Donkee, Index Moll. Maris Jap., p. 16. 

 Jluccinum sjmdiceum. Reeve, Conch. Icon., Buccinum, Index. 

 Buccinum fusoides. Reeve, Conch. Icon., sp. 64. (not sp. 9). 



Shell fusiform, generally rather thin; spire acute; whorls 

 seven to nine, obtusely angulated or rounded; longitudinally 

 plicate; plicae strong and present on all the whorls, or weak and 

 wholly or nearly obsolete on the lower whorls, strongest at the 

 angle and about twelve on the body-whorl; spirally striated; striae 

 nian} T , equal or unequal, close or distant with one or two inter- 

 stitial lines in the latter case. The base is devoid of longitudinal 

 plica 1 even in the strongly plicated forms. Aperture ovate, 

 posteriorly angulated. passing in front into a short strongly 

 recurved canal. Inner lip smooth, generally with only a thin 

 callus. Outer lip, thin, sharp, smooth or only with faint lines 

 within, corresponding to the outer spiral stria?. The largest 

 specimen which has only the spire preserved seems to have been 

 more than 60 millim. in height. 



This is a very variable species. Reeve founded his species 

 on a strongly plicate specimen. But as may be clearly seen from 

 our tigures. the plicate form passes gradually into the one without 

 plica? on the lower whorls. The outer lip is thin in all our 

 specimens, except one, in which it is somewhat thickened, though 

 sharp-edged; its interior, however, is invariably smooth. Very 

 frequent at Shimo-Miyata. 



Fossil occurrence. — Miyata Zone (Shimo-Miyata and Moto- 

 wada); Yokosuka Zone (Otsu); Xaganuma Zone (Naganuma). 

 Upper Musashino of Kazusa. 



Living. — Central Japan. 



