CLASS GASTROPODA 
27 
lous where they cross the ribs; on the last whorl below the periphery 
there are three strong cords with narrower deep interspaces, then a wider 
gap and two more on the canal; aperture subcircular, dark green, with 
an entire simple margin, the operculum muricoid; canal short, solidly 
closed, straight, with an imbricate siphonal fasciole. Height of shell, 
11.5; of last whorl, 8; diameter, 8 mm. (Dali.) 
Type in United States National Museum, No. 207084. Type locality, 
Sitka, Alaska, in 15 fathoms. 
Range. Known only from type locality. 
Genus UROSALPINX Stimpson, 1865 
Shell elongated oval, or short fusiform, longitudinally ribbed or un¬ 
dulated and spirally striated; aperture with a short canal; outer lip den¬ 
tate and lirate within. Operculum somewhat like that of Purpura, semi- 
cordate, with the nucleus at the outer edge a little below the middle. 
(Tryon, Structural and Systematic Conchology.) 
Type. Urosalpinx floridana Conrad. 
Distribution. Atlantic coast of America, Cape Horn, Cape of 
Good Hope, New Zealand, and introduced on the California coast. 
Urosalpinx cinereus Say, 1822 
Journal of the Philadelphia Academy of Natural Sciences, 2:236. American Con¬ 
chology, 3; PI. 20, 1831. 
Shell with a cinereous epidermis, reddish-brown beneath; volutions 
cancellate, the transverse costa eleven, robust; revolving lines filiform, 
irregularly alternately smaller, crenating the edge of the exterior lip, 
which is acute, and alternating with raised lines of the fauces; fauces 
tinged with chocolate color; beak short, obtuse, not rectilinear; fabrum 
not incrassated. Length, 1)4 i n - (Say.) 
Type in Philadelphia Academy of Natural Sciences. Type locality, 
Atlantic. 
Range. San Francisco Bay to San Pedro, California, introduced 
with seed oysters from the Atlantic. 
Described as Fusus cinereus. 
Genus EUPLEURA H. and A. Adams, 1853 
Spire moderate; front canal long, nearly closed; no posterior canal; 
inner lip smooth; varices spiny, fimbriated between the spines. (H. and 
A. Adams.) 
Type. Eupleura caudata Say. 
Distribution. Atlantic coast of United States, West Indies, Panama, 
and California. 
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