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 uj) the doubt at 

 present. 



Succinea rusticana Gould. 



Sjiccinea rusticana GouLD, Proc. Bost. Soc. N. Hist., ii, p. 187, 1846; Moll. 

 U. S. Expl. Exp., p. 28, fig. 29, 1852. — Tryon, Am. Journ. Conch., 11, 

 p. 236, pi. (11) XVII, fig. 19, 1866. — BiNNEY, Land and F\v. Sh. N. Am., 

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



Range. — Tulare valle_y, Calif., northward to British Columbia; 

 the variety alaskatia to Alaska. 



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

 valley, B. C. ! 



N'a.r'x&X.y alaskatia 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 rusticana as figured by Binney, but shorter and more tumid ; length 

 !0, 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, 11, p. 32, 1841. — Binney, 

 Terr. Moll., 11, p. 81, pi. Lxvn, a, fig. 4, 1851. — W. G. Binney, 

 Land and Fw. Sh. N. Am., 1, p. 269, fig. 484, 1869. 



jffaw^e. — 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. 



? Succinea ovalis Say, Journ. Acad. Nat. Sci. Phila., l, p. 



15, 1817. Not 5. ovalis OomM. 

 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 grecri Trvon, Am. Journ. Conch., II, p. 232, 

 pL (II) 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. of the Mississippi Valley. 



