CLASS GASTROPODA 
249 
reticulates the sculpture, but this is lost with wear. Long, of shell, about 
34; of last whorl, 25; of aperture, 16.5; max. diam., 15 mm. (Dali.) 
Type in United States National Museum, No. 110534. Type locality, 
Station 2853, southeast of Alaska peninsula. 
Range. Near Shumagin Islands, Alaska, in 159 fathoms. 
Buccinum rondinum Dali, 1919 
Plate 17, fig. 8 
Proceedings of the United States National Museum, 56:326. Bulletin 112, United 
States National Museum; PI. 12, fig. 3. 
Shell small, pale straw color, thin, with about five well-rounded 
whorls, the nucleus eroded; suture distinct, not appressed; axial sculpture 
of fine close minute incremental lines on which the periostracum rises 
in minute, equal lamellae; spiral sculpture of low, minute, equal threads 
with equal or wider interspaces, over the whole surface; aperture with 
the outer lip simple, arcuate, with the extreme margin slightly expanded; 
inner lip white, erased; pillar short, thin, twisted; canal wide, deeply 
excavated, hardly differentiated. Height of shell, 20; of last whorl, 16; 
of aperture, 11; diameter, 11 mm. (Dali.) 
Type in United States National Museum, No. 110534a. Type locality, 
United States Fish Commission Station 2853, off Alaska peninsula. 
Range. Southeastern Bering Sea, off Alaska peninsula, in 159 
fathoms. 
Buccinum castaneum Dali, 1877 
Plate 5, fig. 7 
Proceedings of the California Academy of Sciences, 7 :3. Proceedings of the United 
States National Museum, 24; PI. 37, fig. 7, 1902. 
Shell large, clear chestnut-brown, with whorls seven in number, in¬ 
flated and smooth, except for microscopic, closely crowded, revolving 
striae. Suture distinct, not channeled. Apex rather acute, pointed. 
Columella straight, with a faint fasciole. Aperture wide, rounded, more 
than semicircular. A slight glaze on the columella. Outer lip heavily 
thickened, expanded, and smooth, not projecting before the column nor 
waved; within livid whitish or purple. Length, 2.5; width, 1.1; length 
of aperture, 1; width, 0.75 in. (Dali.) 
Type in United States National Museum. Type locality, Shumagin 
Islands, 20 fathoms. 
Range. Sannak and Shumagin Islands, 20-41 fathoms. 
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