54 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
perforatam costa antica latissima, spirali; apertura ovata, valde callosa; 
operculo aurantiaco, paucispirali. Long., 0.36; long, spir., 0.26; lat., 
0.12 poll. (Carpenter.) 
Like small, very slender granulata; surface riddled with deep punc¬ 
tures in spiral rows. (Carpenter.) 
Type in California State Collection. Type locality, Monterey, Cali¬ 
fornia. 
Range. Off Oregon coast in 50 fathoms, to Monterey, California. 
Described as Opalia spongiosa. 
Epitonium retiporosum Carpenter, 1864 
Proceedings California Academy of Sciences, 3:222. Supplementary Report, British 
Association for the Advancement of Science, 660. 
O. t. O. bullatae forma simulante, sed sculptura omnino diversa; 
anfr. nucl.(decollatis) ; norm. vii. subrotundatis, suturis impressis; 
costis radiantibus rotundatis, subarcuatis, haud varicosis, circ. xiv., super 
suturas tenue continuis; anfr. ult. seriebus nodulorum spiralibus irregu- 
laribus, vice costarum, instructa, peripheria tuberculosa; tota superficie 
retiprosa, intertestiis alte interpunctatis, punctulis minutissimis, confer- 
tissimis; basi vix costata, a serie nodulorum angulata; apertura rotundata; 
peritremati continuo, varicoso; labro haud sinuato; operculo paucispirali. 
Long., 0.28; long, spir., 0.20; lat., 0.10 poll. (Carpenter.) 
Sculpture in network with deep holes. (Carpenter.) 
Type in California State Collection, No. 1014. Type locality, Catalina 
Island, California, in 40 fathoms. 
Range. Catalina Island, California, to Gulf of California. 
Subgenus Acirsa Morch, 1857 
Epitonium boreale (Beck) Lyell, 1839 
Plate 31, fig. 4 
The Rising of Sweden, 37; PI. 2, figs. 11-12. 
Shell white or pale flesh-color, elongated, turreted, acute; whorls ten, 
convex, with numerous revolving striae; the upper whorls with slight 
transverse undulations or faint costae, which are wanting on the lower 
ones; last whorl slightly carinated; aperture roundish, effuse, and slightly 
angulated in front. Length, 19; diameter, 6.5 mm. (Tryon, American 
Marine Conchology .) 
Range. Aleutian Islands, Alaska; circumboreal. 
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