66 Art. 6.— M. Yokoyama: 



figs. 4, 5) from Ryukyu, Philippines, etc., but the whorls are 

 not so sharply shouldered and the so-called triangular tubercles of 

 the shoulders are wanting. 



Fossil occurrence. — Naganuma Zone (Naganuma). 



Family Doliidae. 



Genus J>oiiutn, Lamarck. 



60. Dolium luteostomum, Küster. 



Pl. IV. Fig. 2. 



Doliu i lut ottomum. Kustbr in Stst. Conch. Cab. Mart. u. Chemn., vol. Ill, pt. 1, B, p. 

 66, pl. 58. fig. 2. Lischke. Jap. Meeresconch., vol I, p. 65, II, p. 57. Brauns, Geol. Env. 

 Tokio, p. 60. Tokonaga, Foss. Env. Tokyo, p. 17, pl. I, fig. 30. Pilsbrt, Cat., p. 49. 



Dnliu n japonizum. Donkkr, Novitates Conchologicse, p. 104, pl. 35, fig. 36. 



Do'.iun varieya urn. Schrenck, Moll. d. Amurl. u. d. nordjap. Meeres, p. 403. 



This shell which becomes very large is characterized by its 

 swollen form, very large bod3 7 -whorl, deep canal like sutures, 

 broad flatly rounded spiral ribs (four or five on the penultimate 

 and sixteen on the ultimate whorl in our fossil specimens) separated 

 by interspaces of a less breadth, large semi-circular aperture, a 

 narrow umbilicus, thin wavy outer lip, etc. The fossils are all of 

 a young state, the largest measuring only 90 millim. in height. 



Pretty frequent. 



Fossil occurrence. — Miyata Zone (Harashita in Shimo-Miyata. 

 Kami-Miyata and Motowada); Yokosuka Zone (Yokosuka); Naga- 

 numa Zone (Naganuma). Upper Musashino of Kazusa, Shimosa 

 and Musashi. 



Living. — Northern, Central and Western Japan: Indian 

 Ocean (Küster). 



Family Cerithiidae. 



Genus Cerifhium, Adanson. 



61. Cerithium kobelti, Dunker. 



Pl. IV. Fig. 10. 



Cerithium, kobelti. Düne er, Malak. Blitter, vol. 24, p. 67. Index Moll. Mar. Jap., p. 106, 

 pl. IV, figs. 8, 9. 



We possess three badly preserved specimens of this well 

 characterized species. The whorls number eight to nine and are 



