CLASS GASTROPODA 
125 
stricted, giving the whorls a conspicuous shoulder; spiral sculpture of a 
few obsolete threads on the base, not extending to the canal and with 
wider interspaces; axial sculpture of (on the penultimate whorl, 16) 
strong obliquely protractive ribs, most prominent at the shoulder where 
they begin, disappearing on the base and obsolete on the last whorl; the 
incremental lines are inconspicuous; aperture rather wide, anal sulcus close 
to the suture, rounded, rather wide but not deep; outer lip thin, much 
produced; inner lip erased, pillar short, canal short, deep, distinct, re¬ 
curved, with a distinct siphonal fasciole. Height of shell, 10; of last 
whorl, 5.5; diameter, 5 mm. (Dali.) 
Type in United States National Museum, No. 214206. Type locality, 
Station 3346, off Tillamook Bay, Oregon, in 786 fathoms. 
Range. Known only from type locality. 
Pleurotomella herminea Dali, 1919 
Plate 3, fig. 1 
Proceedings of the United States National Museum, 56:50; PI. 3, fig. 6. 
Shell of moderate size, gray, with brown apex; nucleus eroded; with 
a total of eight whorls; suture distinct, preceded by an obscure thickened 
margin, not appressed; whorls descending flatly from the suture to the 
shoulder; axial sculpture of (on the last whorl 10 or 11) short, protec¬ 
tively oblique rounded ribs, extending on the spire from the shoulder to 
the succeeding suture, but on the last who*l not over the base; and obscure 
incremental lines arcuate on the anal fasciole; spiral sculpture on the 
spire of three or more threads, with subequal interspaces, in the space 
between the periphery and the succeeding suture, and on the last whorl 
on the base about twenty flatter spirals with narrower interspaces; most 
of the threads are swollen where they pass over the ribs; aperture wide 
and short; anal fasciole deep and rounded, not quite adjacent to the suture ; 
outer lip thin, produced, sharp; body erased; pillar short, gyrate, but the 
axis not pervious; canal distinct, short, slightly recurved. Height of 
shell, 19; of last whorl, 12; diameter, 8 mm. (Dali.) 
Type in United States National Museum, No. 210544. Type locality, 
Station 4407, off Catalina Island, in 600 fathoms. 
Range. Known only from type locality. 
Genus GLYPHOSTOMA Gabb, 1873 
Shell small, fusiform, elegantly and profusely sculptured; aperture 
varicose, columella lip lirate or denticulate, the outer lip similarly orna- 
[1251 
