344 CALLIOSTOMA. 



last whorl here and there show granlose riblets. The aperture is 

 almost twice as broad as high, and elliptical. The cylindrical colu- 

 mella passes gradually into the blunt thick outer lip. The color is 

 brownish-white, perhaps bleached. Alt. 9-1 mill., diam. the same. 

 (Phil.-) 



Habitat unknown, 



. Tr. inconspicuus PHIL., Zeitschr. f. Mai. 1849, p. 158 ; Conchyl. 

 Cab., p. 296, t. 43, f. 12. 



C. NUBILIS Philippi. PI. 18, fig. 22. 



Shell conical, imperforate, granulate, painted with broad purplish 

 maculations and narrower white streaks ; base purplish, concentrically 

 sculptured with about 10 elevated, granulate lines ; whorls subangu- 

 late below the middle, the last rounded at the circumference; 

 penultimate whorl with 7, last with about 9 granulose cinguli ; 

 aperture subrhomboidal, coarctate ; columella very oblique, entire. 

 (Phil.) 



The shell consists of 7 to 8 whorls, of which the upper are quite 

 flat, the rest angled below the middle, the penultimate divided from 

 the last by a notable constriction ; the last whorl is rather rounded 

 at the circumference, flat on the base. On the third whorl I count 

 6 granose lirse , on the following 7, separated by an elevated inter- 

 stitial line ; and on the last whorl 9. The base has 10-12 granose 

 concentric ridges. The aperture is pretty rhomboidal, seeming to be 

 narrowed by the thick peristome, and has a very oblique entire 

 columella. Large purple spots, darker, almost black at their front 

 edges, are separated by narrower white streaks ; the apex is blackish, 

 the base dark flesh-color, with a few girdles of brown dots. 



Alt. 8, diam. 8 mill. (Phil.) 



Habitat unknown. 



Tr. nubills PHIL., Zeitschr. f. Mai., p. 110, 1848; Conchyl. Cab., 

 p. 255, t. 38, f. 2. 



Very close to, or synonymous with, C. jucundwn Gould, described 

 in 1849. 



C. ARRUENSIS Watson. PI. 17, figs. 27, 27a. 



Shell conical, carinated, fiat on the base, strong, opaque, covered 

 with tubercles, and colored with gray and pink. Sculpture: there 

 are eight spiral rows of small round tubercles on each whorl. The 

 tubercles on the first two rows, are larger than the others ; these, as 

 well as the next three rows, are parted by distinct depressions ; the 



