302 University of California Publications in Zoology (Vou. 14 
with a ring of light around the black apical spot; inside it has a wide dark 
border, a large, irregular central dark patch, and generally is suffused with 
dark brown all over. Sculpture obsolete.’’ 
This variety is reported by Pilsbry (1891) from San Francisco. 
The writer has not recognized it among the Survey collections. 
Range—San Francisco to Santa Cruz, California (Pilsbry). 
Acmaea pelta Eschscholtz 
Acmaea pelta Eschscholtz (1829-1833), p. 19, pl. 24, figs. 7-8; Dall (1871a), 
p. 247, pl. 17, fig. 36; Wood and Raymond (1891), p. 57; Pilsbry (1891), 
and pl. 3, figs. 51-56; Dall (1914b), p. 14. 
Description—This species is described by Pilsbry (1891) as follows: 
“Rather large, solid, strong, with low coarse ribs, almost obsolete, or visible 
only posteriorly. Central dark spot of the interior rather small or wanting. 
Grayish-white, with numerous radiating black stripes, often divaricating or 
broken into a tessellated pattern.’ 
Dall (1871la) reported this from Black Point. It is indigenous to 
San Francisco County, according to Wood and Raymond. Not found 
among the Survey collections. 
Range.—Sitka, Alaska, to San Diego, California (Cooper). 
Acmaea persona Eschscholtz 
9 
Acmaea persona Eschscholtz (1829-1833), p. 20, pl. 24, figs. 1-2; Wood 
and Raymond (1891), p. 57; Pilsbry (1891), p. 15, pl. 2, figs. 25-26, 
and pl. 3, figs. 51-56; Dall (1914b), p. 14. 
Description —Pilsbry (1891) described this species as follows: 
“*Shell oval, apex pointing forward, posterior slope long, convex, anterior 
slope short. Sculptured with strong, rounded ribs, usually nodulous, but some- 
times obsolete. Whitish, with stripes and zigzags of blackish-brown, or olive- 
green variegated and speckled with white. Margin crenated by the ribs. 
““Tnside white or stained with yellowish-brown, with a large central deep 
brown area, rarely absent; border articulated black and gray.’’ 
Length, 5 to 33 mm. 
Occurrence.—At Standard Oil Pier, Richmond (7), Presidio (154), 
Sausalito* (108), Bonita Point (59), at station D5768 (14), and 
questionably from D 5762, D 5772. 
This common limpet has been reported by several collectors for the 
vicinity of San Francisco. Although common along the beach, it was 
taken by means of the dredge at only three stations. 
Range.—Sitka, Alaska, to Socorro Island. 
