. Bulletin - United States National Museum. Science. PACIFIC COAST SPECIES. ' If)! Arionta Stearnsiana, Gabb. Shell narrowly umbilicated, subglobose, solid, of a dirty-wliite color, irregularly mottled with crowded ashy blotches^ ^^^ ^g^ grouped into revolving series below, with a decided, wide, brownish revolving band above; with delicate, oblique incremental strife, unequally cut by revolv- ing lines;* spire elevated; whorls 5, rather convex; aperture oblique, semicircular; peristome simple, acute, its columellar termination white, expanded, reflected over the half-concealed umbilicus. Great
. Bulletin - United States National Museum. Science. PACIFIC COAST SPECIES. ' If)! Arionta Stearnsiana, Gabb. Shell narrowly umbilicated, subglobose, solid, of a dirty-wliite color, irregularly mottled with crowded ashy blotches^ ^^^ ^g^ grouped into revolving series below, with a decided, wide, brownish revolving band above; with delicate, oblique incremental strife, unequally cut by revolv- ing lines;* spire elevated; whorls 5, rather convex; aperture oblique, semicircular; peristome simple, acute, its columellar termination white, expanded, reflected over the half-concealed umbilicus. Greater diameter 22, lesser 17"""; height, 12™"'. Helix Stearnsia7)a, Gabb, Am. Journ. Conch., iii, 235, pi. svi, fig. 1 (1867).—W. G. BiNNEY, L. & Sh., i, 177, fig. 310 (1869).—Fischer and Crosse, Moll. Mex. et , , " , . A Stearnbiana Guat., 248, , fig. 5, 5a (1870). Arionta Sfeariisiana, W. G. Binney, Terr. Moll., v, 362. A species of the Mexican fauna, common in Lower California, from San Tomas Elver, Todos Santos Bay, Coronado Island, Todos Santos Island; admitted here because it is found plentifully within the limits of the California Eegion around San Diego. The shell figured and described was received from Dr. Newcomb. It is entirely mature. The genitalia (Terr. Moll., V, Plate XIII, Fig. B) resemble very nearly those of KelletU. A comparison of the figures, however, will show considerable difference, especially in the dart sac (13). In the species before me there is a long, thread-like duct leading from the base of the dart sac to a large globular organ (H:"^), whose character is unknown to me. Opposite the entrance of this duct a corresponding duct (IS'^) branches out, but instead of ending in a globular organ it becomes much enlarged in size and ends in enveloi)ing the ])repuce {p p). The dart sac contained a small dart of the form figured by Leidy (Terr. Moll. U. S., I) for TehennopJioriis Garoliniensis. The oviduct was
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