THE NAUTILUS. 115 
Aperture small and curved, outer lip thick, with two dentations 
within. Length, 4; breadth, 6 mm. 
Type is in the Oldroyd collection Stanford University. Type 
locality, upper Pleistocene at Santa Monica. Collected by Dr. 
Frank Clark, Santa Monica. 
EPITONIUM CLARKI, n. sp. Plate V, fig. 13. 
Shell white, thin, nuclear whorls missing, with 7 well- 
rounded post-nuclear whorls ; varices 14 in number, not all con- 
tinuous; making a half turn around the spire, and with a short 
spine near the sutures. Shell encircled by fine thread-like 
spiral striations not very close together; on the top of each 
whorl near the suture it is entirely smooth but on the base of 
the whorl the lines are closer together, or in pairs; the lines ex- 
tend over the whole base close to the umbilicus. Aperture 
ovate, outer lip thickened. Length, 19; breadth, 8 mm. 
Type is in the Oldroyd collection Stanford University. Type 
locality, upper Pleistocene at Santa Monica. Collected by Dr. 
Frank Clark, of Santa Monica in whose honor it is named. 
TEGULA HEMPHILLI, n. sp. Plate V, figs. 11 & 11a. 
Shell a fossil, thick, depressed, spire slightly conical; color, a 
reddish brown and mottled in appearance. Whorls four in num- 
ber, with slightly angulated shoulders, encircled with a row of 
faint nodules. The whole shell, covered with a coarse wavy 
Striation. Base flattened, slightly concave. Aperture oblique; 
umbilicus wide and deep. Height, 16; breadth, 20 mm. 
Type, University of California. Type locality upper Pleisto- 
cene at Pacific Beach, San Diego, Cal. The type and four other 
specimens were collected by Mr. Henry Hemphill, in whose 
honor the species is named. 
CLATHRODRILLA DIEGENSIS, n. sp. Plate V, fig. 12. 
Shell elongate, spire elevated, apex acute, nucleal whorl 
smooth; seven postnucleal whorls. The whorls of the spire are 
crossed by slanting ribs, sutures deep. On the top of each 
whorl there is a wide revolving groove; on the base of the upper 
whorls there is one groove, on the next to the last whorl there 
are two, the body whorl shows the lines of growth and is 
