CLASS GASTROPODA 
13 
Alabina phanea Bartsch, 1911 
Plate 95, fig. 6 
Proceedings of the United States National Museum, 39:412; PL 62, fig. 6. 
Shell elongate-conic, white, excepting the nuclear whorls which are 
yellowish brown. Nuclear whorls small; the first one and one-half well- 
rounded and smooth; the next two marked by two strong spiral keels, 
which divide the space between the sutures into three subequal parts. 
Post-nuclear whorls strongly, slopingly shouldered, ornamented with mod¬ 
erately strong, decidedly curved, axial ribs, of which 16 occur upon the 
first, 18 upon the second to fourth, 20 upon the fifth, 22 upon the sixth, 
and 18 upon the penultimate turn. In addition to these ribs, the whorls 
are marked by three broad, low, spiral cords, the weakest of which is at 
the summit, while the other two divide the space between the sutures into 
three equal portions. The intersections of the axial ribs and the spiral 
keels form strong tubercles which are truncated posteriorly and slope 
gently anteriorly. The two middle cords are much more strongly tubercu- 
late than the one at the summit. The spaces inclosed between the axial 
ribs and the spiral cords are moderately impressed, squarish pits. Sutures 
strongly impressed. Periphery of the last whorl marked by a channel 
which is crossed by the continuations of the axial ribs that terminate at 
its anterior border. Base short, well-rounded, ornamented with four rather 
broad, weak spiral cords. Aperture subquadrate, channeled anteriorly; 
posterior angle decidedly obtuse; outer lip thin, showing the external 
sculpture within; columella decidedly oblique, strongly revolute and some¬ 
what twisted; parietal wall covered with a moderately thick callus. Length, 
3.6; diameter, 1.1 mm. (Bartsch.) 
Type in United States National Museum, No. 198924. Type locality, 
San Diego, California. 
Range. Known only from type locality. 
Alabina barbarensis Bartsch, 1911 
Plate 96, fig. 3 
Proceedings of the United States National Museum, 39:411; PI. 61, fig. 3. 
Shell broadly conic, creamy white. (Nuclear whorls decollated.) Post- 
nuclear whorls flattened, appressed at the summit, marked by four slender, 
incised, spiral lines, which divide the space between the sutures into five 
equal, flat cords; axial sculpture consisting of lines of growth only. 
Sutures strongly impressed. Periphery of the last whorl angulated. Base 
well-rounded, marked by six spiral lines, which divide it into six cords, 
the posterior five of which are equal, the one about the umbilicus being 
[ 615 ] 
