36 DESCRIPTION OF CALLIOSTOMA PURPUREOCINCTUM. 



unequal size, whicli show an inclination latterly to produce beads ; 

 they are separated by interstices equivalent to each preceding 

 thread. Aperture oblique, rhomboida), peristome simple; colu- 

 mella continuing in the direction of the shell's axis, slightly 

 broadening anteriorly ; within nacre white, lustreless (in the 

 beach-worn examples before me), a callous deposit within the 

 insertion of the outer lip does not extend across tlie roof of the 

 aperture to the insertion of the pillar. 



Alt. 13, diam. 8 mm. 



Hah.— 'Port Stephens, N.S.W. (Cox), and Botany Heads, N.S.W. 

 (Hargraves). 



Type in the Australian Museum. 



This pretty little shell is described at the wish of, and from 

 examples furnished by, Dr. J. C. Cox, who regarded it as new, 

 an opinion shared by Mr. Brazier and myself. It may be suitably 

 intercalated among the species arranged in Pilsbry's Monograph 

 of the genus next to C. jjoupineli, Montrouzier [Man. Conch. (I.), 

 xi. p. 350]. 



Dr. Cox has on several occasions received dead but well 

 preserved specimens of this species from his collectors at Port 

 Stephens. Some faded and broken shells in the Hargraves 

 Collection, labelled " Botany Heads," appear to me to represent 

 the same species. 



The accompanying figure was drawn by the writer from the 

 specimen described, with the aid of an Abbe camera lucida. 



