CLASS GASTROPODA 
157 
which it was often necessary to cut with a knife before the shell could be 
liberated. (Hinds.) 
Type in ? Type locality, on seaweed, San Diego, California. 
Range. Trinidad, California, to Magdalena Bay, Lower California. 
Described as Patella incessa. 
Acmaea depicta Hinds, 1842 
Annals and Magazine of Natural History, 10:82; PI. 6, fig. 4. 
Testa minima, lineari, diaphana, alba, lineis rufis apice radiantibus; 
lateribus cotnpressis; longa quadruplo quoad longitudinem. 
This is a small, delicate shell, white, with irregular brown rays diverg¬ 
ing from the apex, about eight in number on each side, sometimes disposed 
to fork; clouded with a dark spot anteriorly; and the sides much com¬ 
pressed, so as to make the shell four times longer than broad. Length, %o 
of an inch. (Hinds.) 
Type in British Museum? Type locality, on seaweed, San Diego, Cali¬ 
fornia. 
Range. Santa Barbara, California, to Lower California on Zostera. 
Described, Patelloida depicta . 
Acmaea asmi Middendorff, 1849 
Plate 94, figs. 15, 16 
Beitrage sit einer Malacologia Rossica, 2:39; PI. 1, fig. 5. 
Testa minuta, crassa, ponderosa, elliptica, elata atque inflata, vertice 
antico clivo postico multum extus; epidermide fusca vestita, sub micro- 
scopico irregulariter rugosa, saepe (margine) erosa, calcarea, albida; 
intus: albida, margine concolore et centro toto coeruleo. Long., 1; lat., ; 
alt., Y '> vertice ad, $£; totius longitudinis sito: longitudo adulti, 0.08 
Decim. (Middendorff.) 
Shell small, thin but strong and solid, elevated, conical, the base short- 
oval, apex erect, a little in front of the middle; slopes of the cone some¬ 
what convex. Surface lusterless, usually corroded, smooth except for very 
fine radiating striae visible with the aid of a lens, but obsolete in adult 
shells. Color rusty black. Inside black, with a brown zone just outside the 
muscle-scar. Length, 10; breadth, 8 J/ 2 ; alt., 7 mm. (Tryon and Pilsbry, 
Manual of Conchology.) 
Type in Academy, St. Petersburg. Type locality, Sitka, Alaska. 
Range. Sitka, Alaska, to San Diego, California, and Socorro Island, 
Lower California. 
[ 759 ] 
