CLASS GASTROPODA 
53 
Phytia setifer Cooper, 1872 
Proceedings of the California Academy of Sciences, 4:172. 
Outline from ovate to lanceolate, smooth or faintly ribbed longitudi¬ 
nally, pale to dark purplish horn-color, often striped (by erosion of the 
riblets), spire acute, whorls 6-8, the last nearly three-fourths of total 
length, aperture about two-thirds the length, peristome thickened and 
slightly expanded, especially in front, the most perfect with a tubercular 
tooth on middle of outer wall, and less-developed ones below it, lower lip 
curving up to parietal wall, leaving a slight umbilical fissure behind it, 
and ending in a strong horizontal fold that winds like a flat tooth into the 
aperture; parietal wall with a flat horizontal tooth near its middle, and 
one or two more at regular intervals above it; thus showing five teeth 
in the best-developed specimens. Young with a single row of close-cut 
bristles revolving on an impressed line just in front of the suture; but 
lost in adult, though the grooves usually remain. Alt., 0.30-0.40; diam., 
0.08-0.14 in. (Cooper.) 
Type in California Academy of Natural Sciences. Type locality, Mis¬ 
sion Creek, San Francisco. 
Range. Humboldt Bay to San Francisco, California. 
Genus PEDIPES Scopoli, 1777 
Shell imperforate, oval-subglobose, solid, spirally striate, whorls few, 
the last very large; aperture much contracted by teeth; columellar lip with 
usually three dentiform plications, of which the posterior one is largest 
and spiral; outer lip sharp, callous or dentate within. 
Type. Pedipes afer Gmelin. 
Distribution. Red Sea, Mauritius, West Africa, New Caledonia, 
Panama, Lower California, California. Fossil: Eocene, Paris basin. 
Pedipes unisulcatus Cooper, 1866 
Plate 2, fig. 7 
Proceedings of the California Academy of Sciences, 3; PI. 294, fig. 29. 
Shell like a Lacuna, obliquely ovate, the lateral outline subrhomboid, 
translucent, amber-brown, the spire produced, apex obtuse, whorls 4*4, 
the third swollen, with four shallow grooves, the posterior one only much 
impressed, hut vanishing on the last whorl; body with irregular lines of 
growth, undulating across the groove: numerous scattered impressed 
points; aperture ovate, the outer lip acute, purplish, with a double callus, 
within slightly tuberculate at the middle; columellar lip white, callus 
expanded in the plane of the aperture; its inner margin subvertical, with 
