58 LAND AND FRESH WATER MOLLUSKS 



The distribution indicated by the literature is rather odd for a shell 

 ranging so far south, but there is no way of clearing up the doubt at 

 present. 



Succinea rusticana Gould. 



Succinea rusticana GOULD, Proc. Bost. Soc. N. Hist., n, p. 187, 1846 ; Moll. 

 U. S. Expl. Exp., p. 28, fig. 29, 1852. TRYON, Am. Journ. Conch., n, 

 p. 236, pi. (n) xvii, fig. 19, 1866. BINNEY, Land and Fw. Sh. N. Am., 

 I, p. 269, fig. 483, 1869. 



Range. Tulare valley, Calif., northward to British Columbia; 

 the variety alas k ana to Alaska. 



Comox, Vancouver Island, B. C. ! Sumas Prairie, Fraser River 

 valley, B. C. ! 



Variety alaskana Dall, nov. Flats near St. Michael, Alaska ! Point 

 Romanof ! Unalaska ! St. Paul, Kadiak Id. ! 



The Alaskan form is polished, of an olive greenish tinge, with rather 

 inconspicuous lines of growth ; with 3 tumid whorls, the general form 

 of riisticana as figured by Binney, but shorter and more tumid ; length 

 10, max. diam. 8, length of aperture 6.5 mm. This may prove, with 

 more material, to be a distinct species. 



Succinea nuttalliana Lea. 



Succinea nuttalliana LEA, Proc. Am. Phil. Soc., n, p. 32, 1841. BINNEY, 

 Terr. Moll., n, p. 81, pi. LXVII, a, fig. 4, 1851. W. G. BINNEY, 

 Land and Fw. Sh. N. Am., I, p. 269, fig. 484, 1869. 



Range. Oregon, California, Washington and British Columbia. 

 Victoria, Vancouver Island, B. C. 



This species was also reported by Randolph from the Lewes River, 

 Yukon Territory, but in this case the shell was probably the quite 

 similar S. retusa Lea. 



Succinea obliqua Say. 



Succinea obliqua SAY, Rep. Long's Exp., n, p. 260, pi. xv, fig. 7, 1824. 

 BINNEY, Land and Fw. Sh. N. Am., i, p. 265, fig. 475, 1869. 



f Succinea ovalis SAY, Journ. Acad. Nat. Sci. Phila.. I, p. 



15, 1817. Not S. ovalis Gould. 



Succinea campestris GOULD, Inv. Mass., p. 195, fig. 126, 

 1841. DE KAY, Nat. Hist. N. Y., Moll., p. 53, pi. 

 iv, fig. 54, 1843. 



Succinea greeri TRYON, Am. Journ. Conch., n, p. 232, 

 pi. (n) xvii, fig. 8, 1866. 



Range. From Louisiana to Hudson Bay and 

 FIG. 41. Sue- eastward to New England and Gaspe, but not west 

 cinea obliqua. o f the Mississippi Valley. 



