IIO LAND AND FRESH WATER MOLLUSKS 



by me in the paper cited in the synonymy, since publishing which I 

 find Dr. J. G. Cooper had also expressed the same opinion in 1875. 



Ancylus (Ferrissia) rivularis Say. 



Ancylus rivularis Say, Journ. Acad. Nat. Sci., 1, p. 124, 1817. — Haldeman, 

 Mon. Limn., p. 4, pi. 1, fig. 1, 1844 (Delaware River). 



Ancyclus rivularis Say, Nicholson's Encyclopedia, 3d ed., Art. Conchology, 

 vol. II, p. 14, 1819. 



Ancylus {Ferrissia) rivularis Bryant Walker, The Nautilus, xvn, No. 2, p. 

 15, June, 1903 ; xviii, No. 2, p. 17, pi. 1, figs. 1-10, 13-15, June, 1904. 



Range. — Northern United States east of the Mississippi, New- 

 Mexico, Canada, Manitoba. 



Souris River, Manitoba, Dawson. 



Ancylus (Ferrissia) parallelus Haldeman. 



Ancylus parallelus Haldeman, Mon. Limn., pt. 2, p. 3 of cover, 1841 (Ver- 

 mont) ; pt. 7, p. ii, pi. 1, fig. 6, 1844. — Binney, Land and Fw. Sh. 

 N. Am., 11, p. 142, 1865. 



Range. — New England ; Canada, Manitoba. 



Pine Creek; Rainy River; and Lake of the Woods, in Manitoba. 



Ancylus (Laevapex) fragilis Tryon. 



Ancylus fragilis Tryon, Proc. Acad. Nat. Sci. Phila., for 1863, p. 149, pi. 1, 

 fig. 15. — Binney, Land and Fw. Sh. N. Am., 11, p. 146, fig. 246 (Cali- 

 fornia), 1865.— Tryon, Mon. Fw. Univ. Moll. U. S., p. 229, pi. 2, figs. 17, 

 18, 1872. 



? Ancylus caurinus Cooper, Rep. N. Hist. Wash., p. 378, 1859 ; Pacific R. R. 

 Reps., xii, p. 378, 1859, nude name. — Binney, Land and Fw. Sh. N. 

 Am., 11, p. 144, fig. 243, 1865 ; Proc. Cal. Acad. Sci., iv, p. 100, 1870. 

 Black River, Puget Sound. 



Range. — California ; Puget Sound drainage 

 (caitrinus), Vancouver Island near Victoria ! 

 (caztrznus) . 



Tryon unites these under his prior name. 



„ , , The Vancouver specimens are certainly iden- 



Fig. 82. Ancylus too- . , , J 



taniensis Baird. tlcal Wlth C °°P er S shdL 



Ancylus (Laevapex) kootaniensis Baird. 



Ancylus kootaniensis Baird, Proc. Zool. Soc. London, for 1863, p. 69. — 

 Binney, Land and Fw. Sh. N. Am., 11, p. 144, fig. 242, 1865. — Tryon, 

 Mon. Fw. Univ. Moll. U. S., p. 227, pi. 11, figs. 11-12, 1872. 



Range. — Kootenai and Spokane Rivers, British Columbia. 



