204 MOLLUSCA. 
Planazis lineolatus, Goutp; Proceed. Boston Soc. Nat. Hist., ii. 
118. May 1849. Expedition Shells, 60. 
SHELL minute, solid, acute-conical, drab or chestnut coloured, sur- 
rounded with numerous, delicate, dark chestnut bands: spire with 
six or eight whorls, flat, those of the apex somewhat granulated ; the 
last one two-thirds the length of shell, somewhat angular at periphery, 
with a few coarse, revolving strie at base. Aperture less than half 
the length of shell, broad-ovate, without callus posteriorly ; siphonal 
notch nearly closed, edged black; edge of the lip pale or tessellated 
with chestnut: throat dusky : inner edge denticulate. 
Length one-fourth of an inch; breadth one-eighth of an inch. 
Inhabits Wilson’s Islands, Paumotu Group. 
This little shell is not unfrequent in cabinets, but I find no descrip- 
tion of it. 
Figures 251, 251 a, two views of the shell, magnified ; 251 4, natural 
s1ze. 
MELAMPUS MUCRONATUS (Gould). 
Testa parva, ovoidea, glabra, anticé attenuata, basi acuta dilute flavo- 
livescens, anticé subtilissimé undulato-striata : spira conica, mucronata, 
anfractibus octo planulatis, ultimo supernée angulato: apertura linearis 
labro intus incrassato, octo-dentato ; labro tri- vel quadri-dentato. 
Melampus mucronatus, GouLp; Proceed. Boston Soc. Nat. Hist., 
lili. 1849. 
SHELL small, of an elongated, ovoid or rhomboid shape, thin and 
shining, of a pale straw-yellow colour, somewhat tinged with livid, 
more especially about the tip. It is rapidly narrowed anteriorly, and 
terminates acutely; and around the anterior portion it is minutely 
striated with undulating lines. The spire, beginning with the upper 
fourth of the outer whorl, is elevated conical, with a sharp, elongated 
point at tip, and composed of ten flattened whorls, barely defined by 
