98 THE NAUTILUS. 
impressed revolving punctures and by being broader and much 
heavier. 
The ribs are almost obsolete in young specimens. Type is in 
my collection. Examples in National Museum. 
Cyprea Dalli n. sp. Pl. 4, fig. 2. 2a. 
Shell ovate, moderately elevated, surface highly polished, 
crossed above by a number of lines not closely set, dividing the sur- 
face into a series of facets, base ventricose; labrum very much 
thickened, profoundly striated but the striations do not extend up 
over the whole surface. ‘Teeth on outer lip alternate. The smaller 
ones half the length of the others; aperture narrowed in some speci- 
mens in the centre, in others regular and strongly denticulated. 
Length 15 mm.; width 12 mm.; alt. 9 mm. 
This shell is also found at Jackson, Miss. It resembles C. lintea 
Con., and has been considered as that species. It is however larger, 
with a more thickened labrum on which the striations do not reach 
the body of the shell as in Conrad’s species, but stop half way; the 
surface of this shell is very different. In C. lintea the surface is 
completely covered with close-set, very fine lines, while this species 
has but few, and they are not impressed, some specimens being 
smooth. The type retains some color, showing the shell to be choco- 
late brown above with the lip white; C. /intea Con. is figured in my 
Preliminary Report, Pl. V, fig. 2, p. 32, 1886. 
Conrad’s original description contains a misprint which seems to | 
have been perpetuated in later publications. It should read “ with 
fine approximate equal impressed lines,” instead of “four . . 
lines.” Type in National Museum; examples in my collection. 
Pleurotoma Clarkeanan.sp. PI. 4, fig. 3. 
Shell rather solid, fusiform, whorls about nine, spire smooth (?), 
whorls with about eleven strongly raised and rounded ribs crossed 
by coarse revolving lines ; somewhat alternate. The finer lines be- 
tween often being double, especially upon the body whorl. Suture 
appressed, bordered by a corded thread, and this in turn by a con- 
cave space. Aperture oblong-oval. Canal short. Sinus semi- 
circular, and well up in the aperture. Length 31 mm.; breadth 
11 mm. 
Murex (Pteronotus) Burnsiin. sp. Pl. 4, fig. 4, 4a. 
Shell large, with three foliated varices, whorls nine. Nucleus 
pointed, smooth ; whorls convex, appressed at suture, whorls fol- 
