16 
MARINE SHELLS OF WEST COAST OF NORTH AMERICA 
compressed; the escutcheon is narrower and longer and less emphatically 
impressed; the sculpture rises in sharp thin low lamellae, especially on the 
posterior area, which contrast with the thicker, blunt and more irregularly 
distributed ridges of L. niimita. There are about eight large and seven 
crowded small anterior teeth, a narrow oblique resilifer and about twenty, 
nearly all well developed posterior teeth. Length, 13.5 ; height, 6; diameter, 
4 mm. 
Type in U. S. N. M., No. 208872. Type locality, U. S. Fish Commis¬ 
sion Station 4339, off Point Loma, California. 
Range. Known only from the type locality. 
Leda taphria Dali, 1897. 
Plate 37, figs. 7, 7a, 8. 
Nat. Hist. Soc. British Columbia, Bull. 2:7; pi. 2, figs. 6-8. 
Shell small, trigonal, oblong and rounded in front, produced and 
pointed behind; surface sculptured by numerous sharp, concentric, raised 
lines; umbone central, turned toward posterior end; escutcheon long, 
narrow and concentrically striated; hinge with prominent internal carti¬ 
lage-pit, and about twelve sharp teeth on each side; pallial line with a 
small sinus; umbonal area with a linear impression joining the anterior 
adductor. Length, 9; height, 11; diameter, 8 mm. (Dali.) 
Type is in U. S. N. M. Type locality off California coast. 
Range. Bodega Bay, California to Lower California. In the 
Miocene, Pliocene, and Pleistocene of California. 
Leda acuta Conrad, 1831. 
Amer. Marine Conch., p. 182; pi. 38, fig. 496. 
Ovate-lanceolate, ventricose, with prominent concentric striae; an¬ 
terior side longest, rostrated, compressed, acute at the extremity, which is 
slightly recurved; anterior submargin carinated; posterior end acutely 
rounded; basal margin profoundly curved, slightly sinuous near the 
anterior extremity, obliquely subtruncated toward the posterior extremity. 
Length, 6; height, 4 mm. 
Type in State Museum at Albany or Philadelphia Academy. Type 
locality, Atlantic, North Carolina. 
Range. Nazan Bay, Atka Island, Alaska, and Aleutian Islands to 
Gulf of California. Also Atlantic. 
Leda cellulita Dali, 1896. 
Plate 5, fig. 7. 
Nautilus, 10, No. 1. Bull. Nat. Hist. Soc. British Columbia, No. 2; pi. 2, figs 5 7 
Shell solid, with a dull olive-gray epidermis, moderately convex, with 
subcentral, not prominent beaks, base profoundly arcuate, anterior dorsal 
