110 MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Turbonilla talma Dali and Bartsch, 1910 
Canada, Department of Mines, Geological Survey Branch, Memoir No. 14-N, 13; 
PI. 2, fig. 3. 
Shell broadly elongate-conic, dark chestnut-brown, wax-yellow at the 
apex and the columellar area. Nuclear whorls decollated. Post-nuclear 
whorls moderately rounded, feebly shouldered at the summit, marked by 
strong, well-rounded axial ribs, of which eighteen occur upon each of the 
turns. Intercostal spaces about two-thirds as wide as the ribs, well-im¬ 
pressed. Sutures strongly impressed. Periphery of the last whorl well- 
rounded. Base moderately long, and well-rounded, showing scarcely any 
traces of the axial ribs. Entire surface of spire and base crossed by nu¬ 
merous, fine, closely spaced, spiral striations. Aperture oval; posterior 
angle acute; outer lip thin, showing a lighter band half-way between the 
periphery and the summit, in the general chestnut coloration; columella 
slender, twisted and slightly revolute, white. Length, 9; diameter, 2.8 mm. 
(Dali and Bartsch.) 
Type in Geological Survey Museum, Ottawa. Type locality, Barkley 
Sound, Vancouver Island, British Columbia. 
Range. Known only from type locality. 
Turbonilla halibrecta Dali and Bartsch, 1909 
Plate 50, figs. 10, 10a 
Bulletin 68, United States National Museum, 65; PI. 5, figs. 10, 10a. 
Shell elongate-conic. Nuclear whorls two, depressed, helicoid, having 
their axis at nearly right angles to that of the succeeding turns, in the first 
of which they are slightly immersed. Post-nuclear whorls flattened in the 
middle, slightly rounded toward the somewhat shouldered summit and the 
periphery, marked by strong, rounded, almost vertical axial ribs, of which 
there are 20 on the first to fifth, 18 upon the sixth, and 16 upon the remain¬ 
ing turns. Intercostal spaces a little wider than the ribs, well-impressed, 
sutures strongly marked. Periphery of the last whorl well-rounded, marked 
by the feeble continuations of the axial ribs. Base short, well-rounded. 
Entire surface of spire and base marked by exceedingly fine, closely 
crowded, spiral striations. Aperture rather small, oval; posterior angle 
acute; columella short and curved. Length, 6.2; diameter, 1.7 mm. (Dali 
and Bartsch.) 
Type in United States National Museum, No. 205950. Type locality, 
off Catalina Island, California. 
Range. Known only from type locality. 
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