Fossils from the Upper Mnsashino of Kazvisa and Sliiuiosa. " 55 



stronger. But the Japanese species does not grow to such a great 

 size as the European (Tryon figures a specimen 60 milhm. in 

 height, while the Japanese hardly attains 15 niillim. in height) 

 and its canal is sliorter. 



Fossil occurrence. — Shito, Shinagawa. Lower Musashino of 

 Naganuma. 



« 



5<). Sipho (JParasiitlio) uippoiiicus, Yokoyama. 



PI. 11. Fig. 14. 



An imperfect specimen probably belonging to a young shell. 

 P)Ut it exactly coincides in form with the figure of Sipho kroeyeri 

 Möller described as Paraü'pho kroeyeri by Harmer in his Pliocene 

 Mollusca of Great Britain (part ], p. 148, pi. XV, figs. 4, 5. 

 Palaeontogr. Soc, vol. LVII, 1913), the only difference being 

 the presence of two spiral threads dividing the surface of the whorls 

 into three nearly equal parts. These threads are distinctly visible 

 on the interspaces of the longitudinal plicae, while on the plicae 

 themselves they are obsolete. The body-wh(>rl is without any 

 plicae. The fine spiral threads are also present, though only seen 

 with a lens. 



This shell may possibly ]je a mere variety of the well known 

 Arctic species above mentioned. But until more specimens are 

 obtained, it seems to be prudent to treat it as a separate species. 



Fossil occurrence. — ( )take. 



Genus SIPHON Atl A, (Swaiiison). 

 60. Siphotialia spfttlieea, (lieeve). 



SijyJiunaUa sjuidicea. A. Adams, Ann. Mag. Nat. Hist., 1868, XI, p. 203. Smith, Proc. 

 Zool. Soc. London, 1879, p. 205, pi. 20, fig. 38. Dnnker, Ind. Moll, p. 16. Yoko- 

 yama, Foss. Miura Penin., p. 53, pi. Ill, figs. 8-11. 



Biicciitiirn ■sjtndiceam. Pteeve, Conch. Icon., Biicciniim Index. 



Biicciniim fusoides. Eeeve, Conch. Icon., spec. 64 (^not spec. U). 



Neptiinea {tSijihonalia) spadicea. j\Iart. n. Cbem., Syst. Conch. Cab., Ill, pt. 3, p. 130. 

 pi. 42, tig. 8. 



A fine perfect specimen 40 millim. in height, but with the 

 canal a little more bent than usual, and sevei'al fragments. 



