Fossils from the Miura Peninsula and its Immediate North. i',<.) 



There is a single specimen, a little over 30 millim. in height 

 and 10 millim. in diameter lacking the outer lip, which, however, 

 exactly agrees with the above description. 



Fossil occurrence. — Yokosuka Zone (Otsu); Upper Musa- 

 shino of Shimosa and Mnsashi. 



Living. — Central and Western Japan; Philippines; Australia; 

 India. 



65. Potamides (Batillaria) multiformis, (Lischke). 

 Pl. IV. Pig. 9. 



Potamides (Batillaria) multiformis. Pilsbrt, Catalogue Mar. Moll. Japan, p. 57. 



Lampania multiformis. Lischke, Jap. Meeresconch., vol. I, p. 74, pl. VII, figs. 1-10, II, p. 

 69. Dünker, Index Moll., p. 109. Trtox, Man. Conch., IX, p. 167, pl. 35, fig. 13, pl. 34, 

 figs. 6, 8. 



This species is readily distinguishable from the preceding by 

 its shorter form, weak longitudinal folds and many unequal spiral 

 ribs. The body-whorl is very large, occupying one-third to one- 

 half of the height of the shell. The aperture is very wide, and 

 ovate with the outer lip describing an arc of a large circle. 



Frequent. 



Fossil occurrence. — Yokosuka Zone (Yokosuka and Otsu). 

 Upper Musashino of Kazusa and Shimosa. 



Living. — Northern, Central and Western Japan 



Family Cerithiopsidae. 



Genus Ti'iforis, Deshayes. 



66. Triforis otsuensis, Yokoyama. 



Pl. IV. Fig. 11. 



A single specimen. 



Shell small, subulate, many whorled; whorls Hat, with three 

 close rows of tuberculated spiral riblets of which the middle one is 

 weaker than the other two, except on the body-whorl in which 

 they are all of equal size and accompanied below by another 

 untub er culated riblet which forms an angular periphery. Base 

 flattened with a few spiral ridges. Canal short, pointed. 



