CLASS GASTROPODA 
123 
Turbonilla aurantia Carpenter, 1865 
Plate 52, fig. 4; Plate 54, fig. 5 
Journal de Conchyliologie, 12 (series 3, 5) : 147. 
Ch. t. Ch. chocolatae simili, sed multo minore, latiore, haud tereti, 
aurantia; anfr. nucleosis.(detritis) ; normalibus 7 planatis, suturis 
impressis; costulis radiantibus circiter 26, haud expressis, ad peripheriam 
evanidis interstitiis late undatis; lineolis spiralibus castaneis creberrimis 
tota superficie ornata; basi subrotundata; columella parum torta; aper- 
tura ovata; labro tenui, acuto; labio haud conspicuo. Long., .23; long, 
spin, .16; lat., .07 poll. (Carpenter.) 
Shell similar to T. ( P .) chocolata Carpenter, but much broader, with 
the close spiral striation a little more pronounced than in that species, 
covered by a golden-yellow epidermis. Nuclear whorls decollated in all 
our specimens. Post-nuclear whorls moderately rounded, but little con¬ 
tracted at base and but very slightly shouldered at the summit, ornamented 
by about twenty-two moderately developed, slightly retractive axial ribs 
on each of the whorls. These ribs become quite obsolete as they pass 
over the well-rounded periphery and base of the last whorl. Intercostal 
spaces weak, much narrower than the ribs. Sutures quite prominent, 
simple. Aperture large, broadly ovate, posterior angle obtuse, somewhat 
effuse at base; outer lip thin, columella slender, quite oblique, twisted 
and revolute. (Dali and Bartsch.) 
Type in United States National Museum, No. 4493b. Type locality, 
Puget Sound? 
Range. Departure Bay, Victoria, British Columbia, to Puget Sound. 
Subgenus Pyrgiscus Philippi, 1841 
Turbonilla vexativa Dali and Bartsch, 1909 
Plate 55, fig. 11 
Bulletin 68, United States National Museum, 77; PI. 7, fig. 11. 
Shell stout, chestnut-brown. (Nuclear whorls decollated.) Post- 
nuclear whorls flattened in the middle, slightly rounded toward the ap- 
pressed summit, and weakly contracted at the periphery, marked by weak, 
rounded, axial ribs, which terminate abruptly at the periphery, of which 
twenty-two occur upon the fifth, twenty-four upon the sixth and seventh, 
and twenty-six upon the penultimate turn. Intercostal spaces about one 
and one-half times as wide as the ribs, marked by six, equal and equally 
spaced, spiral grooves, which divide the space between the sutures into 
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