304 Unwersity of California Publications in Zoology [Vou.14 
strong, many or few in number, radiating from the apex, but stronger towards 
the margin. Color dead-white inside and out, often livid or tinged a fine pink 
or pea green from Nullipore, never wax-yellow or horny-pellucid as in the normal 
state of Scurria scurra.’’ 
Both Carpenter (1863) and Wood and Raymond list this species 
as occurring in the neighborhood of San Francisco. 
Regarding this variable form, Dall states (1914, p. 14) that ‘‘A. 
var. funiculata Cpr. merges by imperceptible degrees into the later 
(tenwisculpta) and that with A. mitra’’ 
Range.—Aleutian Islands to San Diego (Dall). 
Lottia Gray 
Lottia gigantea (Gray) Carpenter 
Lottia gigantea (Gray) Carpenter (1865c), p. 140. 
Lottia gigantea, Carpenter (1863), p. 650; Cooper, (1870a), p. 60; Dall 
(1871a), p. 260, pl. 15, fig. 20. 
Scurria gigantea, Pilsbry (1891), p. 65, pl. 38. 
Description—This species was described by Pilsbry (1891) as follows: 
“«Shell large, solid, oval, depressed, the apex near the front margin; outer 
surface eroded, of a spongy texture, dull brown, gray toward the summit. In- 
side having a black rim around the margin, deep chestnut brown outside of the 
muscle-impression, which is strong, bluish or purplish-white. Central area 
chestnut brown, more or less mottled with white, rarely entirely white.’’ 
This species is mentioned by Carpenter (1863) and by subsequent 
writers as occurring at both San Francisco and the Farallon Islands. 
Range.—San Francisco, California, to Panama (Pilsbry). 
Lepeta Gray 
Lepeta concentrica (Middendorff) 
Patella (Crytobranchia) coeca var. concentrica Middendorff (1851), p. 183, 
pl. 16, fig. 6. 
Lepeta caecoides Carpenter (1863), p. 651. 
Lepeta concentrica, Pilsbry (1891), p. 69, pl. 40, figs. 33-37. 
Description.—Pilsbry (1891) deseribed this species as follows: 
“Shell depressed conical, apex directed forward; front slope one-third the 
length of the shell or a little less; surface faintly radiately striate (more dis- 
tinetly so in young specimens), not decussated or granulose; light-brownish or 
greenish tinted. 
‘<The outline is ovate, a little narrower in front; front slope slightly con- 
cave, posterior slope convex. The fine thread-like radiating striae are larger 
on the longer slope of the shell; they are not interrupted by concentric growth- 
lines, the latter being inconspicuous, or sometimes strongly impressed at inter- 
vals. Epidermis very thin, yellowish-brown, deciduous. Inside polished, white, 
the anterior terminations of the muscle-scar a little behind the apex. Edges 
of shell level, narrowly bordered with gray, especially in the young.’’ 
