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21:0250 Epitonium onchodes Dall. Panama Bay. 
21:0251 Epitonium lagunarum Dall. Laguna Beach, Cal. 
Shell small, thin, white, with 6 rounded whorls exelusive of 
the (lost), nucleus;. varices a low, narrow; widely spaced, pass- 
ing. .over the entire whorl; spiral sculpture of extremely fine 
striae, with a single thread on the periphery and a stronger one, 
marginating the imperforate base, on which the suture is ‘laid; 
aperture obliquely ovate, the margin slightly produced in front 
and near the suture; length 7:6, diameter 300 mm: t ec" 
21:0252 PICTOSCALA Dall, 1917. Section of Epitonium. 
Tyve (?):—-Scalaria lineata Say, 1822 (non: Kiener, 1838). 
Body more or less dark colored with a feebly developed: basal 
disk, fine spiral striation, rather numerous small varices, and a 
few irregularly distributed very much heavier varices, including 
the terminal one. . 
21:0253 Epitonium purpuratum Dall. Old Panama. 
21:0254 Epitonium (Cirsotrema?) ‘montereyense Dall, 1907. 
(2540). POTN . 
Monterey, to San Pedro, Cal.; varices II, 
21:0255 STHENORYTIS Conrad, 1862. Subgenus of Epitonium. 
(21:0255) Stenorhytis Cossmann, 1912. 
(21:0255) Pseudosthenorytis Sacco, 1891. 
21:0256 Epitonium turbinum Dall, 1908, Galapagos Isl. 
21:0257 NITIDOSCAELA De Boury, 1908. Spiral sculpture none. 
(21:0257) Clathrus Oken, 1815. aes 
21:0258 Epitonium indianorum Cpr. 1865. (1059, 191). 
Varices 12-13; Forrester Island, Alaska, to Todos Santos bay, 
Baja, Cal. 
21:0259 Epitonium tinctum Cpr. 1865. (350). 
Similar to indianorum but more slender, with usually 11 or 
12 varices and a narrow, purple brown line in front of suture, 
which (gradually fades out in the cabinet, tho kept inthe dark. 
Monterey, Cal. to Gulf of Cal. 
21:0260 Epitonium hindsii Cpr: 1856. Panama. 
21:0261 Epitonium fallaciosum Dall. (190. 1058). 
Monterey, Cal., to Guif of Cal.; varices 11-14. Perhaps the 
commonest species at San Diego, Cal., generally distributed un- 
der the name hindsii. 
21:0262 Epitonium subcoronatum Cpr. 1869. (190, 349). 
Vancouver Island, to San Diego, Cal. 
21:0263 Epitonium acrostephanus Dall, 1908. 1469. 
21:0264 Epitonium crebricostatum Cpr. 1869. (1055). 
Vancouver Island to Gulf of Cal. — 
21:0265 Epitonium densiclathratum Dall. Puget Sound. 
21:0266 ‘Epitonium persuturum Dall. San Diego, Cal, 
