CALLIOSTOMA. 371 



backed by a curved purple streak, which is encircled by a band of 

 bright light yellow. Alt. 16, diain. 16 mill. 



Santa Cruz to San Diego. 



Calliostoma tricolor GABB, Proc. Cal. Acad. Nat. Sci. iii, p 186 

 1865. 



May be known by the finely granulated surface with a variable 

 number of narrow spiral purple (or brownish) lines, articulated with 

 white. 



C. GEMMULATUM Carpenter. PL 67, fig. 54. 



Shell conic-elevated, solid but rather thin, imperforate, greenish- 

 olive, with narrow irregular longitudinal blackish-olive stripes. 

 Whorls about 7, of a rounded form, separated by deep sutures, encir- 

 cled by three principal granulose carinse, the base and interstices 

 with smaller lirulse and regular incremental stri3 ; whorls of the 

 spire with two strong carinse. Base rather flattened, with about 10 

 concentric lirse, dotted with brown. Aperture rounded-quadrangular, 

 iridescent ; columella pearly, iridescent, not truncate below, bounded 

 outside by a whitish-yellow streak. Alt. 17, diam. 14 mill. 



San Ignado Lagoon, L. Cal., to San Diego, San Pedro, etc., Cal. 



C. gemmulatum CPE., Brit. Asso. Rep. 1863, pp. 612, 653; Proc t 

 Cal. Acad. iii, p. 2l5. C.farmosum CPR., Proc. Cal. Acad. 1864, p. 

 155, (not of Forbes.) 



A very distinct species. The spire is high, composed of strongly 

 convex whorls, which are encircled by granose caring. The last 

 whorl is more rounded at the periphery than is usual in Calliostoma. 

 C. FONKI Philippi. PI. 57, fig. 48. 



Shell conical, imperforate, thin, pale rose colored, upper whorls 

 plane, tricingulate, the upper cingulus beaded, second and third 

 smooth ; last whorl obtusely angled, encircled by 5 cinguli ; base a 

 little convex, with 6 cinguli ; aperture quadrangular ; columella a 

 little oblique, cylindrical, scarcely truncate, but sensibly passing 

 into the base. 



Alt. from apex to end of columella, 11, diam. of base 9J mill 

 (Phil.) 



Between Chiloe and the mainland of Peru. 

 Trochus fotiki PHIL., Reise durch die Wiiste Atacama, p 185 t 



7, f. 22. 



Similar in sculpture to C. consimilis Smith, but with more convex, 

 lirate base. 



