174 LOO CHOO M0LLU8KS. 



Pterocera bryonia (Jiuel. Tryon, Man. Vol. 7, p. 124, pi. 8, fig. 14; pi. 9, fig. 8. 



Katsuren Jima Is. 5 shells, 3, 12" long aud 2 younger. Native 

 name, Nanatsu-Maimai (seven horned shell). The Japanese name 

 is Kumo-Gai (or spider-web shell). 



Pterocera lambis Linn. Tryon, Man. Vol. 7, p. 124, pi. 8, figs. 1-3. 



Katsuren Jima Is. 41 adult shells. Native name, Nanatsu- 

 Maimai (seven-horned shell). Japanese name, Kumo-Gai (or spider- 

 web shell). Also 41 full-grown but not large. Also 17 small or a 

 smaller variety with brilliant dark chocolate cloudings on the back, 

 and 10 young shells, half-grown, with spines just started. Also 50 

 young shells, without the last spread-whorl or horns. 



Pterocera rugosa Shy. Tryon, Man. Vol. 7, p. 126, pi. 10, fig. 12. 



Katsuren Jima Is. 35 shells. Alladultexcept 5 young; 2 of the 

 adult shells have very much darker pinkish apertures than the 

 others. 

 Seraphs terebellum Linne.* Loo Choo Is. 



CEBITHIID.S:. 

 Cerithium nodulosum Brug. Tryon, Man. Vol. 9, p. 122, pi. 20, fig. 15. 



Kaboshima Is. 34 live shells, the largest species of the family. 

 Cerithium echinatum Lam. Tryon, Man. Vol. 9, p. 123, pi. 20, fig. 274. 



Kudaka Is. Native name, Chiu-Bora. 7 live mature shells. 

 Cerithium tuberculatum Linn. Tryon, Man. Vol. 9, p. 133, pi. 24, fig. 25. 



Yaeyama. 13 live shells. 

 Cerithium columna Sby. Tryon, Man. Vol. 9, p. 123, pi. 20, fig. 19. 



Yaeyama. 3 live shells. 



Cerithium morus var. moniliferum Dufresne. Tryon, Man. Vol. 9, p. 133, pi. 24, 

 fig. 35. 



Yaeyama. 1 live shell. 



Cerithium rubus Mart. Tryon, Man. Vol. 9, p. 131, p. 23, fig. 4. 



Yaeyama. 1 shell. 



Clava (Vertagus) vertagus Linn. White var. Tryon, Man. Vol. 9, p. 149, pi. 29, 

 fig. 69. 



Katsuren Jima. Native name, Shiro-ji-tsu-tan, bora. 14 live 



shells. 



Clava (Vertagus) vertagus Linn. Chestnut-colored var. Fig. 70 of pi. 29. 



Katsuren Jima. 7 live shells. 



