CLASS GASTROPODA 
235 
sata, plicis obliquis costisque concentricis nodosis et tuberculosis gibberosa; 
lateraliter biangulata, in angulo superiore perforata: forminibus tubulosis, 
quique perviis; spira subterminali, prominula; intus concava, plicis multis 
inaequalibus iniqua, margarita splendidissime iridescente, cavitate spirali 
detecta; margine dextro acuto undatim flexo, sinistro subangusto, plaro. 
Diameter, 3" 4"". 
H. with ovate shell, slightly convex, thin, green, high, variegated and 
mottled ; checked with longitudinal oblique plications and concentric nodose 
ribs; laterally biangulate, and perforate in the upper angle; with tubular 
foramens, with subterminal spire, somewhat prominent; within concave, 
convex with many unequal plications, brilliantly iridescently pearly; orna¬ 
mented with a spiral cavity; with right margin acute, undulately bent, with 
the left subangulate, plane. Variety with smaller shell, more plane and 
less rough. 
Type in Museum Gruner. Type locality, Unalaska Island, Kamchatka 
Sea. 
Range. Kamchatka Sea, Sitka, Alaska, to Redondo, California, and 
Sendai, Japan. 
Haliotis assimilis Dali, 1878 
Plate 87, figs. 1, 2 
Proceedings of the United States National Museum , 1:46. Tryon and Pilsbry, Manual 
of Conchology, 12; PI. 22, fig. 29. 
Shell solid, strong, not very thick, with a rather light pink, white and 
greenish nacre, usually with five open holes; spire more elevated than that 
of any other California species, consisting of two and a half or three 
whorls; aperture very oblique in adult specimens, the thickened margin of 
the columella narrow, somewhat concave, inclined sharply inward and 
upward, about three-fourths as long as the columellar side of the aperture. 
Between the row of openings and the columellar edge, the space is unusu¬ 
ally broad, marked midway by an obtuse carina, separated from the row 
of holes by a shallow channel; surface reddish or dull greenish, with 
rather rough, crowded, unequal, spiral ribs and rounded, irregular, wavy, 
radiating undulations crossing the spiral sculpture obliquely. The muscular 
impression, in most specimens, is but lightly marked, and, except for 
occasional spot-like impressions, is smoothly nacreous, like the rest of the 
interior. Long., 4.5; lat., 3.0; alt. of spire, 1.5 to 2.0 in. Aperture 3 inches 
wide and 3.75 long, in an adult specimen. (Dali.) 
Type in United States National Museum, No. 31267. Type locality, 
California. 
Range. Farallon Islands to San Diego, California, in deep water. 
[837 ] 
