112 THE NAUTILUS. 



globose-conic, apex obtuse, narrowly but deeply, umbilicate; 

 whorls five; apical whorls dark purple, which after the third 

 whorl becomes lighter and gradually fades into a yellowish- 

 green on the body-whorl; the dark color of the upper whorls 

 is lighter towards the sutures; on the last half of the body- 

 whorl of Nos. 1 and 3 are several darker, longitudinal striga- 

 tions representing, probably, rest periods. The lips of Nos. 1 

 and 2 are sharp and uncolored, having been taken ai)parently 

 between rest periods; No. 3 has the remains of a dark brown or 

 blackish margin on the lip, and on No. 4 the lip is thickened 

 and deep black. All four shells are quite acutely carinated on 

 the periphery of the upper whorls and in the three larger ones 

 the body-whorl drops slightly below the carina of the preceding 

 whorl and exposes it above the suture, but the carina rapidly 

 diminishes in prominence and is practically obsolete before 

 reaching the lip, which is regularly rounded. The lines of 

 growth are regular but very light, and the entire surface is 

 covered with exceedingly fine, spiral stride, scarcely discernible 

 on the upper whorls, but becoming stronger on the base of the 

 body- whorl; these lines especially on the upper whorls are more 

 or less interrupted by the growth lines giving the appearance of 

 very minute punctations. 



The four shells measure as follows: 



No. 1, alt. 22.5, diam, 17.5; aperture, alt. 12.8, width, 

 11.4 mm. 



No. 2, alt. 20.00, diam. 14.5; aperture, alt. 11.2, width, 

 8.9 mm. 



No. 3, alt. 22.1, diam. 17.1; aperture, alt. 13.0, width, 

 10.0 mm. 



No. 4, alt. 16.9, diam. 12.8; aperture, alt. 9.6, width, 

 8.4 mm. 



Unfortunately No. 4 is the only one with its operculum. 

 This (PI. 8, fig. 7) is like that of V. costatus (Q. and G. ) in 

 having the inner surface divided into three distinct areas with 

 the central and outer portions smooth and polished, but it 

 differs from that species in having the intermediate area with- 

 out granulation, it being finely and concentrically striate. 



