LOO CHOO MOLLUSKS. 177 



PYRAMIDELLID^. 

 Pyramidella sulcata A. Ad. 

 Yaeyama. 6 live shells. 



Pyramidella (Otopleura) mitralis A. Ad.«- 

 Yaeyama, 2 live shells. 



NERITID.S;. 

 Nerita 'Odontostoma) polita Linn. Tryon, Man. Vol. 10, p. 30, pi. 6-7. 



Yaeyama. Many varieties and coloring. Native name, Tsume- 

 Gai (nail shell). 2000 fine live shells. 



Nerita (Odontostoma) picea Reel. Tryon, Man. Vol. 10, p. 3.3, pi. 9, fig. 52. 

 Yaeyama. 100 live shells. 



Nerita (Odontostoma) ascensionis Chem. (?). Tryon, Man. Vol. 10, p. 31, pi. 7, 

 fig. 27. 



The only difference between this shell and the type as figured is 

 that the area is slightly wrinkled. 



Nerita albicilla Linn. Tryon, Man. Vol. 10, p. 19, pi. 2, figs. 21-26. 



Yaeyama. Several color varieties with opercula. 69 live shells. 



Nerita chameleon Linn. var. squamulata LeGuillon. Tryon, Man. Vol. 10, p. 20, 

 pi. 2, figs. 34-36. 



Yaeyama. 3 shells. 

 Nerita albicilla Linn. (var.). 



Yaeyama. 4 live shells. 

 Nerita turrita Chem. Tryon, Man. Vol. 10, p. 37, pi. 11, fig. 2. 



Yaeyama. 2 live shells. 



Nerita (Pila) undata Linn. var. funiculata Rve. Tryon, Man. Vol. 10, p. 29, pi. 7, 

 fig. 30. 



Yaeyama. 2 shells. 

 Nerita helicinoides Rve. var. laevilabris n. var.* PI. IV, fig. 32. 



Shell obliquely globose-turbinate, mu 1 til irate, lirse 18-20 on body- 

 whorl, the lower 3 or 4 nearly obsolete ; buff" or whitish, encircled 

 by three bands of black variegation alternating with similar rose- 

 dotted zones ; on some specimens the black replaced by rose. Spire 

 elevated ; last whorl descending, appressed at suture, concave below 

 it. Aperture oblique, outer lip prolonged above, bevelled to an 

 edge inside, margin yellow with dark dots, within this strongly 

 thickened by a white smooth callus which is generally subtruncate 

 12 



