CLASS GASTROPODA 
275 
Shell small, elongated, acutely conic, white, tinged with rose color, 
closely covered with minute revolving lines, most conspicuous near the 
base of the shell, in most parts microscopic; lower whorl as long or longer 
than the rest of the spire; suture faintly impressed, but distinct; aperture 
about two-fifths the length of the shell, narrow-ovate; outer lip sharp, a 
little everted, smooth within, gently curving to its junction with the spire; 
pillar arcuated, a little flattened, smooth, and white. Length, three-tenths 
of an inch; breadth, three-twentieths of an inch. (Gould.) 
Type in? Type locality, off Cohasset. 
Range. Icy Cape, Arctic Ocean, to Pearl Straits, Alaska; circumboreal. 
Described as Buccinum rosaceum. 
Columbella amiantis Dali, 1919 
Proceedings of the United States National Museum, 56:331. 
Shell small, pure white, solid, with seven moderately-rounded whorls 
exclusive of the (lost) nucleus; suture distinct, not appressed; axial sculp¬ 
ture of more or less evident incremental lines, sometimes so strong as to 
suggest riblets; spiral sculpture of fine threads, almost obsolete on most 
of the shell but coarser and more evident near the canal, covering the 
whole surface with narrower interspaces; aperture semilunate, outer lip 
simple, body erased, pillar very short, canal hardly differentiated. Height 
of shell, 13; of last whorl, 8; of aperture, 4; diameter, 6 mm. (Dali.) 
Type in United States National Museum, No. 221008. Type locality, 
beach at Kiska Harbor, Aleutians, Station 1026. 
Range. Known only from type locality. 
Columbella permodesta Dali, 1890 
Proceedings of the United States National Museum, 12:327; PI. 5, fig. 4. 
Shell small, thin, polished, with five rounded whorls, a pale yellowish 
epidermis covering a bluish-white substratum; transverse sculpture only 
of faint incremental lines; spiral sculpture of fine spiral threads on the 
base of the shell, obsolete or absent between the sutures; aperture wide, 
oval; outer lip thin, simple, very slightly reflected; axis pervious; canal 
wide, extremely short, hardly differentiated; pillar smooth, twisted, not 
callus; suture distinct, not appressed or channeled; nucleus rounded; 
slightly flattened, generally eroded. Maximum longitude of shell, 14; maxi¬ 
mum latitude, 7 mm. (Dali.) 
Type in United States National Museum. Type locality, Station 2807, 
near the Galapagos Islands. 
Range. Unalaska, Aleutian Islands, to San Diego, California. 
[ 275 ] 
