140 
VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
Mangiliaz crebricostata Carpenter. 
Plate X, fig. 3. 
Shell slender, fusiform, white, with a brown band on the 
anal fasciole, and another a little in front of the periphery, the 
latter most conspicuous on the last whorl; nucleus smooth, 
initial part very small, the apex flattened, the whole nucleus 
of about two whorls, followed by five and a half sculptured 
whorls; axial sculpture of (on the last whorl fifteen) uniform, 
flexuous, low, rounded ribs, attenuated on the fasciole, undu- 
lating the suture between the earlier whorls and rapidly becoming 
obsolete on the base of the last whorl; spiral sculpture of fine 
strise on the fasciole, in front of it sharp grooves with wider 
interspaces which at first are threadlike, later flattened, and 
on the last whorl are reduced to rather close-set, feeble, fine 
spiral striae; suture appressed; anal notch feeble; canal 
short, straight, with no siphonal fasciole; aperture narrow, 
elongate; outer lip thin, sharp; pillar lip smooth, white, polished, 
attenuated at the canal; operculum absent: Length of shell 12 
mm.; of last whorl 9-2 mm.; of aperture 6*0 mm.; maximum 
diameter of shell 4 * 25 mm. 
In sand, between tides, at Skidegate inlet, Queen Charlotte 
islands, B.C., collected by W. Spreadborough, in 1910. 
This species was described by Carpenter, in the Annals and 
Magazine of Natural History for January, 1865, though the 
nude name had been printed earlier, in his supplementary report 
to the British Association on the Mollusca of the West Coast 
of North America. The unique type is in the collection of the 
U.S, National Museum and has never been figured. It is a 
beachworn shell with a decollate spire, and with the fine sculp- 
ture of the surface entirely removed by wear, so that it appears 
smooth except for the axial ribbing. It should not have been 
named without better material. However, after some study, 
the fresh shells collected by Mr. Spreadborough seem to be of 
the same species and differ only in their better state of preserva- 
tion. As the shell has never been fully described or figured, 
a description and figure are now supplied for the benefit of 
students. Another form named by Carpenter from Neah- 
