PULMONATA LIMN AEIDAE LIMN ABA PALUSTKIS. 



943 



*Limnaus elodes, SAY, Jour. Acad. Nat. Sci. Phila., ii, 1821, 169. Id., Am. Conch., iv, 

 1832, pi. xxxi, f. 3. Id., Binney's ed., 06, 188, pi. xxxi, f. 3. Id., Chemnitz's 

 ed., 44, pi. viii, f. 3. KUSTEK, in Chemnitz, ed. 2, 42, pi. vii, figs. 17-21. 



Limncea elodes, GOULD, Invert. Mass., 1841, 221, tigs. 146, 147. ADAMS, Verm. Moll., 

 in Thorn's Hist., 1842, 153. ANON., Can. Nat., ii, 1857, 199. 



Limncea fragilia (not of Linnreus), HALD., Mou., 1842, 20, pis. vi-xv, f. 1 ; 53, pi. xiv, 

 f. 1. DEKAY, N. Y. Moll., 1843, 68, pi. iv, f. 68. 



Limncea palustris, MULLER (Buccinwn), &c. SHEPPAKD, Trans. Lit. Hist. Soc. Quebec, 

 i, 1829, 196. BINNEY, Laud & Fresh Water Shells N. A., pt, ii, 1865, 45. 

 KOBEETS, U. S. Geol. Surv. Terr., 1870. 468. 



Limncea nuttaliana, LEA, Proc. Acad. Nat. Sci. Phila., ii, 1841, 33. Id., Trans. Am. 

 Phil. Soc. Phila., ix, 1844, 9. Id., Obs., ii, 9. KUSTEK (Limnccus), in Chem- 

 nitz, ed. 2, 38, pi. vii, f. 5. 



Limna-a pleleia, GOULD ('?). 



Limncea expansa, HALD., Mou., 1842, 29, pi. ix, figs. 6-8. Id., Suppl. to pt. i, 1840, 

 3. DEKAY, N. Y. Moll., 1843, 75, pi. xxxvi, f. 348. KUSTER (Limnivim), 

 in Chemnitz, ed. 2, 39, pi. vii, tigs. 6, 7. 



Ranging- from New England through Pennsylvania and Kansas to Cali- 

 fornia and Oregon. Very numerous in British America (Binney). No 

 living specimens found in Utah ; very abundant on the mud flats of the 

 Sevier, and at Panquitch Lake, with Planorlis trivolvis. 



Found in following localities : 



* Probably future researches will replace elodes. 



tDr. Lewis states tbat "excellent reasons exist why Limnocus elodes sbould be retained. In all 

 probability, our shell is distinct. I am sure that catascopi urn gives birth to elodes by proper change of 

 station. The European pereger is by no means identical with catascopium, though it may be presumed to 

 stand in the same relation to the European palustris that catascopium does to the American elodes." 



