188 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
Solen sicarius Gould, 1850. 
Plate 49, fig. 1, and plate 18, fig. 1. 
Proc. Boston Soc. Nat. Hist., 3:214. Rep. U. S. Expl. Exp., Moll.; fig. 501. 
Shell elongated, transversely oblong, sub-cylindrical or tubular, some¬ 
what falcate; beaks terminal; anterior extremity truncate obliquely at an 
angle of about 30°, somewhat everted, the portion posterior to a line across 
from the beak to the base convex; posterior extremity rounded; dorsal edge 
rectilinear; ventral edge regularly arcuate, so that the posterior extremity 
becomes about two-thirds the height of the anterior; surface notably 
undulated by the stages of growth, parallel to the posterior end; the dorsal 
and ventral triangles not definitely marked, covered by a firm, glistening, 
horn-colored epidermis; valves very convex. Hinge with a single, erect, 
recurved, triangular tooth in each valve. Length, inches; height, % 0 
of an inch; diameter, % 0 of an inch. (Gould.) 
Type locality. Strait of Juan De Fuca, and territory of Oregon. 
Range. Vancouver Island, British Columbia, to San Diego, Cali¬ 
fornia. In the Pleistocene at San Pedro; the Pliocene at Twelve Mile 
Creek, San Mateo County, and San Fernando; the Miocene at Walnut 
Creek, Contra Costa County, California. 
Solen rosaceus Carpenter, 1864. 
Plate 49, fig. 6. 
Suppl. Rep. Brit. Assoc., p. 638. Ann. Mag. Nat. Hist. (3), 15:177. 
S. testa S. sicario simili, sed minore; multo angustiore, elongata, recta, 
extus et intus rosacea; epidemide tenue valde nitente. Long., 27; lat., 5; 
alt., 32 poll. (Carpenter.) 
Type in British Museum. Type locality, Santa Barbara, California. 
Range. Santa Barbara, California, to the Gulf of California. In the 
Pleistocene at Santa Barbara, San Pedro and San Diego; the Pliocene at 
Santa Rosa, San Ramon, Kirker’s Pass, Contra Costa County, San 
Fernando and San Diego Well; the Miocene at Tamales, Marin County, 
and Martinez, Contra Costa County, California. 
Genus ENSIS Schumacher, 1817. 
Shell elongated, transverse, gaping and rounded-truncate at its extremi¬ 
ties, straight or somewhat curved; hinge composed of two teeth in one 
valve and three in the other; anterior muscular impression elongated, 
horizontal; pallial impression with a short, truncated sinus; siphons short, 
divided. 
Type. Solen magnus Schumacher. 
Distribution. United States, Europe, Patagonia, Philippines, Austra¬ 
lia. 
