no 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 1S75. 



Ancylus (Ferrissia) rivularis Say. 



Aiuyiiis rivularis Say, Journ. Acad. Nat. Sci., I, p. 124, 1817. — Haldemax, 

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



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

 vol. II, p. 14, 1819. 



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

 15, June, 1903 ; xviii. No. 2, p. 17, pi. i, figs, i-io, 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. I, fig. 6, 1844. — BiNNEY, Land and Fw. Sh. 

 N. Am., II, p. 142, 1865. 



Range. — New England ; Canada, Manitoba. 



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



Ancylus (Laevapex) fragilis Try on. 



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

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

 Black River, Puget Sound. 



Range. — California ; Puget Sound drainage 

 {caurimts')., Vancouver Island near Victoria! 

 (caitrinus) . 



Tryon unites these under his prior name. 



The Vancouver specimens are certainly iden- 

 FlG. 82. Ancylus koo- . , . , ^ , 1 ,-, 



. T. • J tical with Cooper s shell. 



iantensis Baird. " 



Ancylus (Laevapex) kootaniensis Baird. 



ncylus kootaniensis Baird, Proc. Zool. Sc 

 Binney, Land and Fw. Sh. N. Am., 11, 

 Mon. Fw. Univ. Moll. U. S., p. 227, pi. 

 Range. — Kootenai and Spokane Rivers, British Columbia. 



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, pL 11, figs. 11-12, 1872. 



