CLASS GASTROPODA 
237 
Diadora aspera Eschscholtz, 1833 
Plate 85, fig. 11; Plate 93, fig. 1 
Zoological Atlas, Part 5, 21; PI. 23, fig. 5. 
Testa elliptica, convexo-pyramidata, albogrisea, transversim sulcata, 
costis prominentioribus asperas radiata, foramine ovali inclinato, margine 
crenato subreflexo. Lange, 1" 8'"; Greite, 1" 2"'; Hohe, 8"'. (Esch¬ 
scholtz.) 
Shell ovate, narrower in front, conical, the slopes nearly straight or a 
little convex behind the middle. Sculptured with numerous radiating rib- 
lets, of which 30-34 are larger, the intervals between them bearing about 
three smaller ones; the whole decussated by close elevated concentric lirae, 
which are more or less scale-like and imbricating. Color soiled whitish, 
with numerous wide blackish rays. Inside white, hole-callus white, very 
abruptly truncated behind; margin deeply and sharply crenulated. Per¬ 
foration short-oval, nearly circular, in front of the middle. Length, 56; 
width, 40; height, 18 mm. (Tryon and Pilsbry, Manual of Conchology.) 
Type in St. Petersburg Museum? Type locality, Sitka, Alaska. 
Range. Cook's Inlet, Alaska, to Magdalena Bay, Lower California. 
Diadora aspera densiclathrata Reeve, 1850 
Conchologia Iconica, Fissurella, fig. 64. 
Fiss. testa ovata, medio elevata et antiee inclinata, liris concentricis et 
radiantibus undique dense clathrata, orificio subrotundo; albida aut flavi- 
cante, olivaceo radiata. (Reeve.) 
Shell ovate, elevated and inclined anteriorly in the middle, thickly lat¬ 
ticed throughout with radiating and concentric ridges, orifice nearly round ; 
whitish or yellowish, rayed with olive. (Reeve.) 
Type in Museum Cuming. Type locality? 
Range. Monterey, California, to San Quentin Bay, Lower California, 
and Socorro Island. 
Diadora murina (Carpenter MS) Dali, 1885 
Proceedings of the United States National Museum , 8:543; also 15:197. 
Two found dead, one at Catalina. (This is the Glyphis densiclathrata 
of Californian conchologists, but not of Reeve; G. saturanlis of Pilsbry— 
Nautilus, V., p. 105—not of Carpenter; and G. densiclathrata var. murina 
of Carpenter.) (Dali, Proceedings , 15:197.) 
Type in United States National Museum. Type locality, Catalina 
Island. 
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