CLASS GASTROPODA 
127 
but which are nearly obsolete on the second half of the last whorl; aper¬ 
ture rather narrow, the outer lip varicose, minutely denticulate within and 
a sharp edge, the anal sulcus deep and rounded with a nodular callus on 
the body; inner lip with six or more denticulations; canal short, deep, and 
strongly recurved. Height of shell, 10; of last whorl, 5 ; diameter, 3.7 mm. 
(Dali.) 
Type in United States National Museum, No. 267597. Type locality, 
head of Conception Bay, Lower California. 
Range. San Pedro, California, to Santa Maria Bay, Lower California. 
Glyphostoma cymodoce Dali, 1919 
Proceedings of the United States National Museum, 56:54; PI. 17, fig. 6. 
Shell small, flesh colored, slender, acute, with a smooth, small, purple- 
brown nucleus of about two whorls and about six subsequent whorls; 
suture appressed with a slightly constricted fasciole immediately in front 
of it sculptured by half a dozen fine, sharp, close-set, equal, spiral threads; 
other spiral sculpture of (on the spire two to four) flattish spiral major 
cords with equal or wider interspaces in which runs an intercalary smaller 
thread; on the last whorl this sculpture is continuous over the shell from 
the shoulder to the base, but the intercalary threads gradually enlarge 
until they are practically equal to the originally larger cords; the small 
siphonal fasciole has a few finer and closer threads; axial sculpture of 
(on the penultimate whorl about 11) rounded vertical ribs extending 
from the shoulder to the succeeding suture, but obsolete on the last 
whorl and nodulose where they are intersected by the cords; the incre¬ 
mental lines are only conspicuous on the anal fasciole, where they are 
slightly puckered in front of the suture; aperture subovate, anal sulcus 
deep, rounded, close to the suture with a subsutural callus; outer lip 
thickened, slightly crenulate by the external sculpture, smooth within, 
arcuately produced, with a prominent varix behind it; inner lip erased, 
pillar short, canal short, distinct, slightly recurved. Height of shell, 11.5; 
of last whorl, 6; diameter, 4 mm. (Dali.) 
Type in United States National Museum, No. 150569. Type locality, 
Santa Barbara, California. 
Range. Monterey to Santa Barbara, California. 
Genus PHILBERTIA Monterosato, 1884 
Philbertia lias the outer lip thickened, lirate or dentate within when 
adult, pillar smooth, nucleus smooth, rather elevated and acute. Differs 
[1271 
