CALLIOSTOMA. 371 



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

 bright light yellow. Alt. 16, diam. 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 Avith 

 white. 



C. GEMMULATUM Carpenter. PI. 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 lirul?e and regular incremental strise ; whorls of the 

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

 concentric lirffi, 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 Ignacio Lagoon, L. Cal., to San Diego, Sa7i Pedro, etc., Cal. 



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

 Cal. Acad, iii, p. 215. — C. formosmn Cpr., Proc. Cal. Acad. 1864, p. 

 155, (not of Forbes.) 



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

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

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



C. FONKi Philippi. PI. 57, tig. 48. 



Shell conical, imperforate, thin, pale rose colored, uj^per 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 ; a})erture quadrangular ; columella a 

 little oblique, cylindrical, scarcely truncate, but sensibly j^assing- 

 into the base. 



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

 (Phil.) 



Between Chiloe and the mainland of Peru. 



Trochus foiiki Phil., Reise durch die Wiiste Atacama, p. 185, t. 

 7, f. 22. 



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

 Urate base. 



