10 
83 Omphalius aureotinctus 
Height and diameter about 3 cm; shell pearly white inside, 
solid, epidermis gray or nearly black, often nearly white with 
incrustating algae; whorls banded by a few heavy, rounded, spiral 
ridges, with wavy crossings; umbilicus large, stained a bright 
ellow. 
? Monterey (?) and San Diego, Cal., to Santa Margarita Island, 
Baja Cal. Santo Domingo, and Cerros Island, Baja Cal. 
84 Haliotis cracherodii Leach 
Shell 110-125 mm long, 90-100 mm wide, about 40 high; 2-16, 
usually 5-7 holes 5-12 mm apart and 3-5 in diameter; epidermis 
dark bluish green or olive, commonly distinguished as the ‘“‘black 
abalone;’’ interior pearly white, with (rarely blue, green, and) 
rose irridescence; scars of the closed holes show nearly to the 
apex of the shell, especially plain in perfect polished specimens; 
epidermis sometimes of a beautiful reddish brown. 
Farallon Island to Turtle bay, and Cape San Lucas, Baja Cal.; 
at Santa Rosalia, north of Lagoon Head, hundreds of sacks of this 
species were loaded on the steamer at the time of my visit. Abun- 
dant at common low water at San Diego, and at Todos Santos 
bay, Baja Cal.; very variable. 
85 Haliotis splendens Reeve 
Not rare on rocks below tide, from Catalina Island, Cal., to 
Cedros island, and received from Magdalena bay. The pearl fish- 
ers at Santo Domingo, Baja Cal., had only two or three at the 
time of my visit. 
The famous Blue Abalone; brilliant with lustrous blue and 
green irridescence; holes 4-7; credited with a length of a foot. 
86 Haliotis corrugata Gray 
A large arched shell, very rough, with 3-5 holes, around which 
are formed prominent tubercles with acute edges; margin crenu- 
lated. 
Santa Barbara, Cal., to Cerros Island, Baja Cal.; the pearl 
fishers at Santo Domingo, Baja Cal., had about two dozen fine 
typical specimens. Apparently occurs in deep water; not common, 
87 Fissurella volcano 
Shell about an inch long, oblong-conical, with red stripes on 
its sides running down from the small oblong hole at the top, 
suggests streams of red hot lava issuing from the crater of a vol- 
cano; the coloring is most brilliant on beach worn specimens. 
Monterey, Cal.; larger and more numerous at Todos Santos 
bay than in the vicinity of San Diego, where it is also abundant; 
found dead at Santo Domingo, and Fischer found it at Tres 
Marias, in the Gulf of Cal. 
S88 Fissurella violacea 
Santo Domingo, Baja Cal., one dead. 
89 Lucapina crenulata 
At San Diego, this great species is not rarely found on the 
rocky ocean beaches, in pools, or among the sea-grass with Ap- 
lysia Californica. Dr. R. EB. C. Stearns records from Monterey, 
Cal., and I have found it at Todos Santos bay and at Santo Do- 
mingo, Baja Cal. According to Dall, very young specimens are 
of a lurid pink. 
