1918] Packard: Molluscan Fauna from San Francisco Bay 301 
Acmaea limatula Carpenter 
Acmaea limatula Carpenter, Dall (1914b), p. 14. 
Patella scabra Reeve, Carpenter (1863), p. 650; Dall (1878b), p. 47; 
Pilsbry (1891), p. 13, pl. 3, figs. 38-49. 
Patella spectrum Nuttall, Reeve (1855), pl. 29, fig. 76. 
Description.—This form is described by Pilsbry as follows: 
“‘Shell thin, rounded-oval, depressed; apex situated between the center and 
the anterior third; surface sculptured with close, fine, minutely scaly riblets, of 
which larger ones are placed at regular intervals. Color light yellow, indis- 
tinetly spotted (rarely striped in divaricating pattern) with brown.’’ 
Carpenter reports this species from the Farallon Islands and from 
San Francisco. It is not uncommon along the shores of San Francisco 
Bay and along the beaches outside the Golden Gate. 
Range.—Vaneouver Island to Lower California. 
Acmaea patina Eschscholtz 
Acmaea patina Eschscholtz (1829-1833), p. 19, pl. 24, figs. 7, 8; Carpenter 
(1863), p. 650; Pilsbry (1891), p. 11, pl. 2, figs. 34-37, pl. 9, figs. 6-14. 
Acmaea patina var. cwmingii Reeve, Dall (1871a), p. 249. 
Description.—The following is Pilsbry’s (1891) description of this species: 
‘*Shell large, oval or rounded-oval, depressed-conic, the apex rounded and 
near the middle; slopes slightly convex. Surface obsoletely radiately striated, 
olive-gray, tessellated, or more rarely striped, with black. 
“*Ynside white with an irregular brown central area and a rather wide dark 
or tessellated border.’’ 
Length, 14 to 38 mm, 
Occurrence—At Richmond (17), Red Rock (5, 2), Presidio (5), 
Sausalito (7), Bonita Point (10), at station D 5811 (1), and ques- 
tionably at D 5796. 
Carpenter (1863) lists this limpet from San Francisco. The only 
specimen referred to this species was dredged by the,‘‘ Albatross’’ in 
one fathom of water within the lower portion of the bay. 
Range.—Aleutian Islands, Alaska, to San Diego, California (Pils- 
bry). 
Acmaea patina Eschscholtz var. pintadina (Gould) 
Lottia pintadina Gould (1846b), p. 151; (1862), p. 9; Pilsbry (1891), 
p. 12, pl. 9, figs. 10-14. 
Description.—This variety is characterized by Pilsbry (1891) as follows: 
‘«This shell when young is dark olive closely dotted all over with white, the 
eroded apex black; when adult it is usually uniform dull ‘slate-color outside 
