350 THE CHICAGO ACADEMY OF SCIENCES. 



much smaller apcrature. It approaches nearest in general form to 

 some individuals of Galba clodcs jolietensis, from which it may be 

 known by its narrower and flatter body whorl, its less rounded and 

 more oblique whorls, and its longer and narrower aperture. 



Kirtlandiana has been considered by many excellent conchologists 

 a synonym of both exilis and lanccata, from both of which it seems 

 perfectly distinct. The type specimen in the Smithsonian Institution 

 (No. 118662) agrees well with Binney's figure. Specimens of exilis 

 from Poland, Ohio, in the Lea collection, have doubtless been the 

 cause of its reference to exilis. All of Lea's specimens which have 

 been examined are immature; the adult shell is figured on plate 

 XXXVII, figures 13-14. A specimen from the Lewis collection re- 

 ceived from Lea, now in the possession of Mr. Bryant Walker, is 

 identical with the type and agrees perfectly with the shells figured on 

 plate XXXVII. Tryon's figure in Haldeman's monograph (pi. 18, 

 fig. 10) is very poor, showing the whorls too flat-sided and too oblique, 

 and particularly misrepresenting the shape of the body whorl. A 

 peculiar flat-sided type of shell has been received from Iowa under the 

 name of kirtlandiana, but this is referable to exilis (see under exilis ; 

 see also plate XXXVII, figure 11). Kirtlandiana, when understood 

 and properly distinguished from exilis and lanccata, will doubtless be 

 found to occupy a large territory, in the states from Ohio to Nebraska 

 and from the Lake Superior region southward to the vicinity of the 

 40th parallel. 



Galba lanceata (Gould). Plate XXXVII, figures 17-22. 



Limn&a lanccata GOULD, Proc. Bost. Soc. N. H., Ill, p. 64, 1848. BINNEY, 

 Check List, p. 12, 1860; L. & F.-W. Sh. N. A., p. 68, fig. 112, 1865. CURRIER, 

 Kent. Sci. Inst., Mis. Pub., No. 1, 1868. TRYON, Con. Hald. Mon., p. 113 (87), 

 pi. 18, fig. 11, 1872. SMITH, U. S. Fish Com. Rep. 1872-73, p. 702, 1874. 

 WALKER, Journ. Conch., II, p. 330, 1879. STEARNS, Proc. Nat. Mus., XIV, p. 

 101, 1891. WALKER, Nautilus, VI, p. 33, 1892. TAYLOR, Ottawa Nat., VI, p. 35, 

 1892. WALKER, Rev. Moll. Mich., pp. 6, 18, 1894; Nautilus, IX, p. 4, 1895. 

 STEARNS, Proc. Nat. Mus., XXIV, p. 291, 1901. RUTHVEN, Rep. Mich. Acad. 

 Sci., VI, p. 190, 1904. 



Limnca lanccata GOULD, Agassiz's Lake Sup., p. 244, pi. 7, figs. 8, 9, 1850; 

 Otia Conch., p. 206, 1862. 



Lymncza lanceata GOULD, Rep. N. Y. State Mus., XXVII, p. 53, 1875. 



Acella lanceata TRYON, Amier. Journ. Conch., 1, p. 258, 1865. 



Leptolimnea lanceata DECAMP, Kent. Sci. Inst., Mis. Pub., No. 5, p. 8, 1881. 



SHELL : Elongate-cylindrical, rather thin, compressed ; periostra- 

 cum light to very dark horn colored ; surface dull to shining ; growth 

 lines and spiral lines very heavy producing a conspicuously marked 

 reticulated appearance; whorls 6 to 6^2, flatly rounded, slightly oblique, 



