280 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
ture, though so much smaller than the Florida species. I have named it 
Aesopus myrmecoon. (Dali.) 
Type in United States National Museum, No. 105498. Type locality, 
San Pedro, California. 
Range. San Pedro, California, to Point Abrejos, Lower California. 
Aesopus goforthi Dali, 1912 
Nautilus , 25 :127. 
Shell smooth, slender, elongate, with inconspicuous sutures and about 
eight whorls; nucleus defective, smooth; subsequent whorls gradually in¬ 
creasing, moderately convex; color greenish-waxen with flammules of 
dark chestnut so arranged on the last whorl as to form two irregular 
bands, one above and the other below the periphery, which also show in 
the interior of the aperture and on the base of the pillar; the paler portion 
of the surface is also irregularly mottled with opaque whitish blotches. 
Aperture short, rather wide; the outer lip simple, sharp, smooth within; 
body and pillar smooth, with a thin wash of callus; canal short, wide, not 
recurved. Length of shell, 12; of last whorl, 6; of aperture, 4; maximum 
diameter of shell, 3.3 mm. (Dali.) 
Type in United States National Museum, No. 249624. Type locality, 
Monterey, California. 
Range. Known only from type locality. 
Genus AMPHISSA H. & A. Adams, 1853 
Shell with the aperture anteriorly dilated, the contraction near the 
spire obsolete. (H. & A. Adams.) 
Shell bucciniform, longitudinally ribbed; spire elevated; aperture 
rather wide, enlarging below and terminating in a wide anterior sinus; 
inner lip callous, plicate below; outer lip not thickened on the margin, 
plicate within. (Tryon, Manual of Conchology .) 
Type. Amphissa corrugata Reeve. 
Distribution. West coast of North America. 
Amphissa Columbiana Dali, 1916 
Plate 16, fig. 1 
Nautilus , 30 :27; PI. 6, fig. 9; PI. 11, fig. 9. 
Shell yellowish-brown, sometimes obscurely spotted and variegated, 
white within the aperture. Length, 1 in. (Reeve.) 
Described as Buccinum corrugatum Reeve, 1846. This is not the Buc- 
cinum corrugatum of Brocchi, 1814, and, since it is very abundant on the 
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