The Agate Shells 



The Bloody Agate (A. sanguined, Newc.) has a pointed spire 

 of flattened whorls. The ground colour of dark red is crossed 

 by an irregular system of zigzag streaks of black. Length, J inch. 



Habitat. — Lehiu, Oahu. 



Genus CARELIA, H. and A. Ads. 



Shell long, turriculated, with flattened whorls; columella 

 strongly arched and twisted; aperture small. Few species in 

 Hawaiian Islands. 



The shells of this genus are larger than in Achatinella. They 

 show a prevailing preference for shades of brown. 



The Obelisk Carelia (C. obeliscus, Rve.) is three times as 

 high as its width at base. There is a sharp median angle on the 

 body whorl. Dark brown at base, the colour gradually fades 

 toward the blunt apex. Length, 3 inches. 



Habitat. — Hawaii. 



Cuming's Carelia (D. Cumingiana, Pfr.) is the handsomest 

 species. Each flattened whorl is bevelled at both margins as if 

 by an edged tool, making the suture a regular channel, which is 

 outlined with white spiral lines. The browns in the elongated 

 spire emulate the shading in a middle-aged meerschaum pipe. 

 Length, 2 inches. 



Habitat. — Kauai. 



278 



