CLASS GASTROPODA 
77 
bluish-white, except where the dry animal shines through the texture of 
the shell, where it lends this a rosy flush. Whorls moderately rounded, sep¬ 
arated by a slightly constricted suture. Periphery of the last whorl well- 
rounded. Base moderately long, well-rounded. Aperture elongate oval ; 
posterior angle acute; outer lip drawn forward between the posterior angle 
and the base; inner lip slightly curved and partly appressed to the base; 
parietal wall covered by a thin callus. Length, 6.2; diameter, 2.3 mm. 
(Bartsch.) 
Type in United States National Museum, No. 56911. Type locality, 
Catalina Island, California. 
Range. Catalina Island to San Martin, California. 
Melanella hemphilli Bartsch, 1917 
Plate 40, fig. 6 
Proceedings of the United States National Museum, 53 :313; PI. 37, fig. 6. 
Shell straight, stout, elongate-conic, polished, marked by exceedingly 
fine lines of growth and scarcely perceptible microscopic spiral striations, 
the two forming an exceedingly fine and very regular incised grating on 
the surface; bluish-white. Whorls moderately rounded, very slightly con¬ 
stricted at the sutures. Periphery of the last whorl well-rounded. Base 
moderately long, but somewhat inflated, well-rounded. Aperture small, 
oval; posterior angle acute; outer lip thin at the edge, which is scarcely at 
all drawn forward between the posterior angle and the base. Parietal wall 
covered with a thick callus. Length, 8.3; diameter, 3 mm. (Bartsch.) 
Type in United States National Museum, No. 106514. Type locality, 
Point Abreojos, Lower California. 
Range. San Diego, California, to Point Abreojos, Lower California. 
Melanella compacta Carpenter, 1864 
Plate 40, fig. 3 
Supplementary Report, British Association for the Advancement of Science, 659. 
Proceedings of the California Academy of Sciences, 3:221. Proceedings of the 
United States National Museum, 53; PI. 37, fig. 3. 
Eu. t. Eu. micanti jun. simili, sed multo minus terti; marginibus spirae 
parum excurvatus; anfr. nucl. ? .... (detritis), norm, vii; basi et apertura 
elongatis; labro parum sinuato. Long., 0.25; long, spir., 0.15; lat., 0.09 
poll. (Carpenter.) 
Shell broadly elongate-conic, straight, polished, the surface marked by 
exceedingly fine lines of growth and scarcely perceptible microscopic spiral 
striations. Whorls flattened, separated by a scarcely defined suture; in fact, 
the basal portion of the preceding whorl shines through the substance of 
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