MITRELLA. 121 



revolving line, appearing on the spire-whorls ; outer lip faintly 

 sinuated above, denticulate within. Length, 13 mill. 



Australia. 



The form is the same as in (./. austrina, the only difference 

 being in the position and width of the colored band. I think 

 that they will prove to be identical, and that both are described 

 from worn specimens which have lost a more superficial coloring. 



C. ARANEOSA, Gould. 



Shell, form of C.austrina, but reticulated and maculated with 

 fulvous and white; aperture violet-tinted. Length, 10 mill. 



Knyosima Buy and China Coast (Stimpson). 



Not figured. The types were, I suppose, destroyed in the great 

 Chicago fire. 



C. BUCCINOIDES, Sowb. PL 4<), fig. 1. 



Shell deep chocolate, nearly black, usually with a row of white 

 spots on the periphery, and sometimes a less conspicuous similar 

 row at the suture ; aperture dark within. Length, 18 mill. 



Peru; under stones at low water (Cuming). 



C. AVENA, Reeve. PI. 49, fig. 2. 



Shell smooth, shining, striated below ; reticulated, flamed and 

 spotted with orange-chestnut and white ; aperture violet-tinted, 



denticulated within. Length, 13 mill. 



Buffalo, Cape Colony. 

 C. TENUH, Gaskoin. PI. 49, fig. 3. 



Shell thin, with acuminated spire and inflated body-whorl, 

 smooth, striated below ; whitish, w r ith bold flames and zigzag 

 lines of orange-brown; aperture purplish, expanded below; outer 

 lip thin, without teeth, sinuated posteriorly. Length, 14 mill. 



Habitat unknown. 

 C. PULLA, Gaskoin. PL 49, figs. 4-7. 



Shell acuminate!}' oblong, dark chestnut or chocolate-color 

 without and within, columella whitish or sometimes tessellated 

 with chestnut; sometimes the surface is lighter-colored, and then 

 it reveals an obscure reticulated pattern with faint spots at the 

 suture and on the periphery ; outer lip without teeth. 



Length, 13 mill. 



Port Jackson, Australia. 



C. nux, Reeve (fig. 5), appears to .be merely a somewhat 

 stouter example of this species. C. badia, Tenison-Woods (fig. 6), 



