CLASS GASTROPODA 
59 
Epitonium persuturum Dali, 1917 
Proceedings of the United States National Museum, 53 :478. 
Shell with three, smooth, brown, nuclear and five, subsequent, thin, 
white whorls separated by an unusually deep suture; varices ten, narrow, 
rounded, continuous up the spire which they encircle about half way, 
but not expanded at the suture into which they dip; the whorls are 
slightly flattened above the shoulder, but there is no corresponding angle 
or spine on the varices. Length, 15.5; diameter, 6 mm. (Dali.) 
Type in United States National Museum, No. 211021. Type locality, 
beach at San Diego, California. 
Range. Known only from type locality. 
Epitonium fallaciosum Dali, 1917 
Proceedings of the United States National Museum, 53:487. 
In 1856 Carpenter described from Panama a species of Nitidoscala 
with eight varices, under the name of *9. hindsii . By some confusion 
he transferred the name in 1865 to a well-known form from California 
which has eleven to fourteen varices and ranges from Monterey to the 
Gulf of California, but so far as is known does not reach Panama. For 
this Californian shell I propose the name of Epitonium fallaciosum. 
(Dali.) 
Type in United States National Museum. Type locality, Monterey, 
California. 
Range. Monterey, California, to Gulf of California. 
Epitonium hexagonum Sowerby, 1844 
Proceedings, Zoological Society of London, 29. Thesaurus Conchyliorum, Part IV; 
PI. 33, fig. 67. 
Seal, testa brevi, laevi, imperforata; anfractibus contiguis, varicibus 
sex, crassis, prominentibus, ad apicem oblique continuis; apertura rotun- 
data; colore albo. 
A short, imperforate, white species, with whorls closely united and 
strong varices, forming about six oblique lines along the spire. (Sowerby.) 
Type in cabinet of Mr. Cuming. Type locality, Acapulco, Mexico. 
Range. Santa Cruz, California, to Panama. 
Described as Scalaria hexagona. 
Epitonium tiara Carpenter, 1856 
Proceedings, Zoological Society of London, 164. 
S. testa obesa, laevi, albida; anfr. vii parum attingentibus, rapide 
augentibus; costis xii acutis valde extantibus, infra suturam parum alatis, 
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