1918] Packard: Molluscan Fauna from San Francisco Bay 305 
The Farallon Islands is the type locality of this species. It was 
not obtained by the U.S. S. ‘‘ Albatross.’’ 
Range.—Northern Japan to the Farallon Islands, California. 
HALIOTIDAE 
Haliotis Linnaeus 
Haliotis cracherodi Leach 
Plate 34, figure 1 
Haliotis cracherodi Leach (1814-1817), p. 131; Carpenter (1863), p. 651; 
Cooper (1870a), p. 61; Pilsbry (1890), p. 79, pl. 10, figs. 52-53; Camp- 
bell (1891), p. 103. 
Description.—The following is Pilsbry’s (1890) description of this species: 
““Shell oval, convex, spire near the margin; surface almost smooth, but 
usually showing nearly obsolete spiral lirae. Perforations about 8, color 
greenish-black or dull purplish-black. 
‘“An oval shell with the two sides equally curved, the back regularly convex, 
not carinated at the row of perforations; outside covered with a thick black 
layer. Surface smooth, except for spiral lirae which are sometimes wholly 
obsolete, and lines of growth. Spire low, near the margin. Inside smooth, 
silvery with red and green reflections; columellar plate not truncate below, 
sloping inward, its face concave; cavity of spire very small, almost concealed.’’ 
This abalone has been reported by several collectors from the 
Farallon Islands, and by Carpenter from San Francisco. It is not 
in the Survey collection. The specimen figured was obtained from 
Moss Beach, San Mateo County, California. 
Range.—Farallon Islands to Cape St. Lucas, Lower California 
(Campbell). 
Haliotis gigantea Chemnitz 
Haliotis gigantea Chemnitz (1780-1795), p. 115, pl. 167, figs. 1610, 1611; 
Pilsbry (1890), p. 84, pl. 7, fig. 42; Campbell (1891), p. 103. 
Description—Pilsbry (1890) described this species as follows: 
“*Tt is of a rounded-oval outline, the back quite convex, highest in the 
middle. It is solid, but not very thick, reddish-brown, radiately streaked more 
or less with chocolate and green. The spiral cords are low but strong, and 
there are irregular but very strong wave-like obliquely radiating folds above. 
The perforations are situated in high tubercles upon a strong dorsal angle, 
below which the left side slopes steeply to the columellar margin; this slope 
has low spiral cords, waved or festooned below the row of holes, and it has 
also an obtuse ridge parallel with that row, not far below it. The spire is very 
small, quite low. Inside there are shallow spiral sulci and indentations at the 
positions of the cords and waves of the exterior. The nacre is light colored 
or silvery, to a high degree iridescent, reflections of emerald green and red 
predominating. The muscle attachment is smooth, but its posterior and lateral 
outlines are marked by a rugose line. Columellar plate wide, its face concave, 
sloping inward. Open perforations 4.’’ 
