364 CALLIOSTOMA. 



within ; outer lip thin, fragile ; columella vertical, cylindrical, 

 pearly, not toothed at base. Alt. 30, diam. 27 mill. 



OffSta. Barbara Id., Cat., 414 fms, 



Callistoma platinum DALL, Proc. U. S. Nat. Mus., 1889, t. vii,. 

 f. 2. 



A lovely shell, very thin, white, with a faint tinge of "robin's 

 egg " blue or green. It seems to group nearer C. annulatum than 

 any other known species. 



I am indebted to the extreme liberality of Dr. W. H. Dall for the 

 privilege of including this species as well as C. Rioensis, in my 

 monograph, his own descriptions being still in print. 



C. VARIEGATUM Carpenter. 



Shell small, conical, variegated ; nucleus rosaceous ; whorls 6, 

 planate ; sutures hardly impressed ; spire with 3 regular, nodulous 

 riblets, the nodules whitish, subdistant ; interstices very elegantly 

 rosy ; lirulse of the base 8, scarcely nodulous, spotted with rosy. 



Alt. -24, diam. '21 inch. (Qor.) 



Puget Sound. 



Calliostoma (f wzr.) variegatum CARPENTER, Proc. Acad. Nat. 

 Sci. Phil., 1865, p. 61. 



'This may prove to be an extreme variety of Cal. annulatum 

 Martyn.' (Cpr.) 



I have not seen this form. Dr. Dall has expressed to me the 

 opinion that it is a distinct species. The type is, I believe, still 

 unique. Dr. Carpenter would have benefited science more by 

 suppressing than by publishing those miserable descriptions of 

 doubtful forms, some of which in spite of the long-continued labors 

 of Dall, Stearns, Cooper and others, still defy identification except 

 by a journey to where the types are deposited. 



(Group of C. lima Phil.} 



C. LIMA Philippi. PI. 67, figs. 55, 56, 57, 58. 



Conical, imperforate, quite solid and strong, whitish (tinged mere 

 or less with yellow or blue), with irregular, radiating, brownish or 

 bluish-black maculations on the upper surface, the principal spiral 

 lirse sparcely articulated with dark dots ; frequently all color-marks 

 are absent ; the shell is then of a uniform cream color, with bluish or 

 brown apex. There are about 8 whorls, the later ones concave above,. 



