CLASS GASTROPODA 
67 
Lacuna unifasciata Carpenter, 1856 
Proceedings, Zoological Society of London, 205. 
L. t. parva, solida, conica, ad basin angulata; anfr. v. laevibus, parum 
convexis, sutura distincta; rufo-fusca, linea intensiore ad carinam suturae 
convenientem, interdum maculis adjacentibus; rima umbilicali a labio 
subcelata; apertura ovali; apice regulari. Long., 23 ; long, spir., 11; lat., 15 
poll. (Carpenter.) 
Small, glossy, generally with a colored keel, sometimes broken into 
dots. (Carpenter.) 
Type in Museum Gould. Type locality, Santa Barbara, California. 
Range. Santa Barbara, California, to Magdalena Bay, Lower Cali¬ 
fornia. 
Lacuna unifasciata aurantiaca Carpenter, 1864 
Supplementary Report, British Association for the Advancement of Science, 656. 
Keel obsolete, resembling the chinked Phasianella . (Carpenter.) 
Type in ? Type locality ? 
Range. Santa Barbara, California, to Point Abreojos, Lower Cali¬ 
fornia. 
Lacuna marmorata Dali, 1919 
Proceedings of the United States National Museum, 56:348. Tryon, Manual of Con- 
chology, 9: PI. 50, fig. 58. 
Shell small, short, acute, dark brown (fading in the cabinet), of three 
or four rapidly enlarging whorls; suture distinct; surface, when unworn, 
with a fine spiral striation which is sometimes feeble; the last whorl has a 
marked keel at the margin of the base in most specimens, but this region 
is frequently more or less rounded, and is generally whitish with inter¬ 
rupted brown flecks, which painting occasionally spreads over the upper 
part of the whorl; a white band in front of the suture is common, and on 
the base the white may be extended to a brown area bordering the um¬ 
bilicus. Height, 6; diameter, 5 mm. (Dali.) 
Type in United States National Museum, No. 47081. Type locality, 
Monterey, California. 
Range. Saginaw Bay, Alaska, to San Diego, California. 
Subgenus Boetica Dali, 1918 
Lacuna vaginata Dali, 1918 
Proceedings of the Biological Society of Washington, 21:137. Proceedings of the 
United States National Museum, 56:349. 
Shell small, solid, conical, white, smooth except for faint incremental 
lines, of about five rapidly enlarging whorls including a minute, subglobu- 
[ 669 ] 
