12 
DESCRIPTION OF SPECIES. 
2. STROPHIA LEVIGATA Novo. 
Smooth StrophSa. 
Plate II, 2 & 2b, shell. 
DESCRIPTION. 
Sp. Ch. Size, large. Shell, robust and heavy. Striations, absent. 
Tentacles, about one fifth as long as eye peduncles. Teeth, two, and very 
long. Whirls, 11. Examined 150 specimens. 
Form of shell, inclined to cylindrical, the first and second whirls 
being equal in diameter, and the third is but little smaller, and from this 
the shell tapers to quite an acute point, making an angle of .55 degrees. 
The striations are represented only by faintly defined lines of growth, 
that are, however, more prominent on the upper whirl, especially on the 
right side near the aperture, where there are some prominences, but 
these prominences are widely separated and irregular. 
The aperture is small and contracts rapidly within, and the teeth 
are long and prominent; the central which is placed midway between 
the two walls, is .25 long, and the upper which is placed slightly above 
it, makes a complete turn around the column. 
The margin is not produced forward beyond the diameter of the 
shell, but is greatly thickened, and the outer posterior portion is provid- 
ed with a thin, though not very prominent, edge. The frontal bar is 
prominent and interrupts the striations, thus the lower wall of the ap- 
erture is smooth. Jaw, as in S. pannosa, and the animal is similar in 
form, but paler in color above. 
Color of shell, externally, white, slightly flesh colored at extreme 
tip of apex; internally, pale purplish brown, but this color does not ex- 
tend beyond the teeth, but fades gradually as it approaches them, so that 
both they and the walls beyond them are yellowish brown. 
DIMENSIONS. 
Size of types, 1.25 by .52 and 1.15 by .48. Largest specimen, 1.34 
by .55; smallest, 1.06 by .47. Greatest diameter, .55; smallest, .46. 
Longest specimen, 1.34; shortest, 1.06. 
OBSERVATIONS. 
The cylindrical form prevails, but there is a tendency among some 
shells to assume a more pointed apex, and in these cases the third whirl 
is much smaller than the one above it, and in some instances the upper 
whirl is the largest. The color is nearly always uniform white, but in 
some specimens there is a tinging, not a flecking, of fleshy or pinkish, 
due to a thinning of the outer covering, evidently the result of abrasion. 
