CLASS GASTROPODA 
55 
Epitonium boreale ochotense Middendorff, 1849 
Beitrage su einer Malacologia Rossica, 2:9 8. Sibirischc Raise, 213; PI. 12, figs. 12-14. 
Testa elongate, crassa, lactea, subdiaphana; anfractibus contiguis, vix 
convexitate prominentibus sulculis linearibus longitudinalibus confertim 
cinctis; caricibus plicatilibus, vix prominulis, aequalibus, confertis; an- 
fractu ultimo basi angulato-carinato; suturis distinctis nec impletis; aper- 
tura basi ad columellam nonnihil producta, superius ad suturam angulato; 
peristomate subnullo, ad columellam callositate valde parca vie continuo. 
(Middendorff.) 
Thick, white, subdiaphanous; whorls numerous, flatly convex, with 
irregular spiral impressed striae, and very irregular, thick, slightly oblique, 
low ribs. Length, 60 mm. (Tryon, Manual of Conchology.) 
Type in Museum, St. Petersburg. Type locality, south coast of the 
Sea of Okhotsk. 
Subgenus Boreoscala Kobelt, 1902 
Epitonium greenlandicum Perry, 1811 
Conchology; PI. 28, fig. 8. 
Shell of a pale brown, invested with thong-shaped ribs; the four 
upper folds of the spire smooth; the mouth round. (Perry.) 
Type locality, Greenland. 
Range. Arctic Ocean near Point Barrow and southward on the 
west to north Japan; on the east to Wrangell, Alaska; circumboreal. 
Fossil: Pliocene. 
Subgenus Asperoscala De Boury, 1909 
Epitonium bellastriatum Carpenter, 1864 
Proceedings of the California Academy of Sciences, 3:221. Supplementary Report, 
British Association for the Advancement of Science, 660. 
S. t. curta tenuissima, albida; anfr. vii. valde tumentibus, haud nisi 
per costas attingentibus; costis circ. xvii. acutis extantibus, reflexis, haud 
semper in spira attingentibus, postice angulatis, parum spinosis; inter- 
stitiis circa spiram basimque dense spiraliter lirulatis, lirulis rotundatis, 
super varicum angulum obsoletis; apertura ovata, umbilico magno. 
Long., 0.78; long, spir., 0.55; lat., 0.38 poll. (Carpenter.) 
Shape like pretiosa, jun.; ribs very close, spinous at shoulder, crossed 
by spiral riblets. (Carpenter.) 
Type in California State Collection, No. 393b. Type locality, Mon¬ 
terey, California. 
Range. Monterey to San Diego, California. 
[353 1 
