CLASS GASTROPODA 
205 
Odostomia sitkaensis Clessin, 1900 
Martini and Chemnitz, Conchylien Cabinet, 2d ed., Pyramidella, 121:30; fig. 1. 
T. parva, acute-conica, non rimata, glabra, nitida, opaca, solidula, 
flavescente-albida; spira acuta; anfractu 6 parum convexi, lente et regu- 
lariter accrescentes, sutura profunda separati. anfr. ultimus ad basin 
rotundatus; apertura acute-ovata, l /$ long, testae aequans, superne acumi¬ 
nata, labro acuto, arcuato, columella arcuata, dente parum prominente 
armata, labio interno angusto. Lg., 4; diameter, 1.5 mm. (Clessin.) 
Shell elongate-conic, very regular in outline, yellowish-white, shining. 
Nuclear whorls almost completely immersed in the first of the succeeding 
volutions. Post-nuclear whorls moderately rounded, rather high between 
the sutures, slightly shouldered at the summits, marked by many fine lines 
of growth and numerous fine wavy spiral striations; the latter are more 
regularly developed and distributed than the lines of growth. (Our figure 
does not show the spiral markings.) The periphery of the last whorl 
marks the greatest diameter of the shell. The base, though rather long, 
falls off rather abruptly at the periphery, then tapers gradually to the 
anterior end of the columella; it is marked like the spaces between the 
sutures. Aperture large, oval; posterior angle acute, outer lip decidedly 
curved, almost patulous, thin; columella long, slender, gently curved, and 
somewhat reflected, provided with a moderately strong, oblique fold near 
its insertion; parietal wall without callus. Ihe Berlin collection contains 
two specimens of this species, No. 26232, from Sitka, Alaska. (Dali and 
Bartsch.) 
Type in Berlin Museum, No. 26232. Type locality, Verbreitung, Sitka, 
Alaska. 
Range. Known only from type locality. 
Odostomia skidegatensis Bartsch, 1912 
Plate 61, fig. 1 
Proceedings of the United States National Museum, 42:284; PI. 38, fig. 7. 
Shell elongate-conic, yellowish-white. Nuclear whorls completely im¬ 
mersed in the first of the succeeding turns, above which only half of the 
last turn projects. Post-nuclear whorls very slightly rounded, feebly 
shouldered at the summit, marked by incised spiral lines, which are much 
stronger on the first two volutions than on the remaining. Of these lines, 
10 appear upon the second turn. On the last, they are reduced to exceed- 
inly fine striations. Sutures moderately constricted. Periphery of the last 
whorl decidedly inflated and feebly angulated. Base somewhat prolonged, 
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