236 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Haliotis corrugata Gray, 1828 
Wood, Index Testaceologicns, Supplement, PI. 8, fig. 6. Conchologia Iconica, 3; 
species 12. 
Shell ovate, convex, spirally closely ridged, ridges prominently raised 
throughout in swollen wrinkles, sometimes obliquely crossed with waved 
folds, perforations few in number, large, tubiferous, three only open; 
exterior rayed with dark green and reddish chestnut, edged with black, 
very beautifully iridescent. (Conchologia Iconica.) 
Type in Museum Cuming? Type locality, California. 
Range. Monterey, California, to San Quentin Bay, Lower California. 
Family FISSURELLIDAE 
Genus DIADORA Gray, 1821 ( Glyphis; Fissuridea ) 
Shell ovate-conical; orifice anterior to the center, elliptical. Surface 
cancellated by radial ribs and concentric growth lines. Internal callus 
around the orifice heavy and slightly truncated behind. Interior of shell 
smooth; margins crenulated. (I. S. Oldroyd.) 
Type. Fissuridea asp era Eschscholtz. 
Distribution. Universal but mostly in warm seas. 
This is equal to Genus glyphis. 
Diadora inaequalis Sowerby, 1834 
Proceedings , Zoological Society of London, 126. Conchologia Iconica, 6; species 50. 
Fiss. testa oblonga, tenui, subdepressa, latere antico brevi, postico 
longo; intus albicante, margine albo ingroque vario, crenulato; extus radi- 
atim striata, concinne decussata, olivacea albicante subraditim variegata; 
apertura dorsali antica, oblonga, utrinque bidentata: long., 1.1; lat., 0.6 
poll. 
Shell oblong-ovate, attenuated and much inclined anteriorly, raised in 
the middle, slightly compressed at the sides, radiately thinly ridged, finely 
latticed with concentric striae, orifice rather small, oblong, a little con¬ 
tracted in the middle; rusty black, ash-white around the orifice. (Reeve.) 
Type in Museum Cuming. Type locality, Galapagos Islands. 
Range. Santa Barbara, California, to Manta, Ecuador, and the Gala¬ 
pagos Islands. 
Described as Fissurella inaequalis, Sowerby. 
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