154 BULLETIN 91, UNITED STATES NATIONAL MUSEUM. 



six in all. Aperture subcircular, outer lip thin, showing the external 

 sculpture within, somewhat wavy at the edge; columella short, stout, 

 strongly curved; parietal wall covered with a thin callus. 



There are two cotypes, Cat. No. 221, U.S.N.M., collected by Wil- 

 liam Stimpson on the North Pacific Exploring Expedition at False 

 Bay, Cape of Good Hope. The larger of them, the specimen figured, 

 has four postnuclear whorls, and measures : Altitude, 7.2 mm. ; greater 

 diameter, 8.5 mm.; lesser diameter, 7.5 mm. Cat. No. 101, U.S.N.M., 

 contains one specimen also collected by William Stimpson at the 

 Cape of Good Hope. Cat. No. 901 08&, U.S.N.M., one specimen from 

 the Cape of Good Hope. 



GIBBULA FULGENS Gould. 



Plate 26, figs. 4, 5, 6. 

 Gibbulafulgens Gould, Proc. Bost. Soc. Nat. Hist., vol. 8, p. 21, 1861. 



Shell helicoid with rather elevated spire, light brown with blotches 

 of dark brown and yellowish-white, these usually on and near the 

 spiral cords, a pearly luster shining through the thin epidermis, par- 

 ticularly in the lighter areas. Nuclear whorls two and one-half, 

 well rounded, smooth, white. Postnuclear whorls ornamented by 

 spiral cords of which three strong ones and two slender ones occur 

 between the summit and the periphery on the first two whorls. The 

 first strong cord is at the summit, the second, half way between the 

 first and third, while the third is as far posterior to the suture as the 

 second is removed from the first. The stronger of the two fine cords 

 is half way between the first and second strong cords and the lesser, 

 half way between this and the one at the summit. On the last turn 

 a third slender cord occurs between the first and second strong cords, 

 dividing the space between the medium slender cord and the second 

 strong cord into equal portions; another slender cord divides the 

 space between the second and third strong cords medially. Sutures 

 strongly impressed. Periphery of the last whorl angulated. Base 

 well rounded, narrowly umbilicated, marked by 10 strong spiral 

 cords, which are almost equal and equally spaced, becoming succes- 

 sively only a trifle less strong and more approximated to each other 

 from the periphery toward the umbilicus. Aperture subcircular, 

 very oblique; outer lip thin at the edge, thick within; columella 

 strong, decidedly curved; parietal wall covered with a thin callus. 



The type, Cat. No. 2046, U.S.N.M., was collected by William 

 Stimpson on the North Pacific Exploring Expedition at the Cape of 

 Good Hope; it has three and one-fourth postnuclear whorls, and 

 measures: Altitude, 8 mm.; greater diameter, 7.5 mm.; lesser diam- 

 eter, 7 mm. 



