466 THE CHICAGO ACADEMY OF SCIENCES. 



any American shell which the writer has seen and it is probably an 

 introduced species. It somewhat approaches Galba parva, being dis- 

 tinguished, however, by its short, wide spire and by its widely open 

 umbilical chink and very erect inner lip. The obliquity of the aper- 

 ture is also peculiar. It has not been thought best to give a name to 

 this Lymnaea, as it may have been previously named by some European 

 malacologist. It bears a close resemblance to some European figures 

 of Galba truncatula, but differs markedly from all specimens of that 

 species which have been examined, in the shape of the body whorl 

 and inner lip. 



NUDE NAMES. 



Limncza alternata SAY, BELL, Rep. Prog. Can. Geol. Surv., p. 252, 1858. 

 BINNEY, L. & F.-W. Sh. N. A., II, p. 72, 1865. WHITEAVES, Can. Nat. & Geol., 

 VIII, p. 103, 1863. From Point Levis, Canada. 



Limn&a conoidea SAY, H. & A. Adams, Genera Rec. Moll., II, p. 253, 1858. 

 BINNEY, L. & F.-W. Sh. N. A., II, p. 71, 1865. 



Limnaa corrugata SOWB., Tank Cat., p. 42, 1825. BINNEY, L. & F.-W. 

 Sh. N. A., II, p. 71, 1865. 



Limncea cygmata SAY, Christy, Journ. Conch., IV, p. 347, 1885. 



From Dulierin, Manitoba (Dawson). 



Lymnea gr drills DEKAY, Cat. An. N. Y., p. 32, 1839. BINNEY, L. & F.-W. 

 Sh. N. A., II, p. 70, 1865. 



Limncea fossaria ]. de C. SOWB., Fauna Bor.-Amer., p. 316, 1836. BINNEY, 

 L. & F.-W. Sh. N. A., II, p. 70, 1865. DALL, Alaska Moll., p. 80, 1905. 



Limn&a lineata SAY, H. & A. Adams, Gen. Rec. Moll., II, p. 253, 1858. 

 BINNEY, L. & F.-W. Sh. N. A., II, p. 71, 1865. 



Limncea minuta C. B. ADAMS, Cat., p. 32, 1847. 



Lymnea nlgrescens DEKAY, Cat. An. N. Y., p. 32, 1839. BINNEY, L. & 

 F.-W. Sh. N. A., II, p. 70, 1865. 



Lymnaa ovata LAM., HITCH., Geol. Zool. Mass., p. 37, 1835. 



Limnaa petitii BECK, Index, p, 113, 1838. BINNEY, L. & F.-W. Sh. N. A., 

 II, p. 71, 1865. DALL, Alaska Moll, p. 80, 1905. 



From Newfoundland. 



Omphiscola pugio BECK, Index, p. 113, 1838. BINNEY, L. & F.-W. Sh. 

 N. A., II, p. 71, 1865 



From Mexico. 



Lymnea reticulata DEKAY, Cat. An. N. Y., p. 32, 1839. BINNEY, L. & F.-W. 

 Sh. N. A., II, p. 70, 1865. 



The following species, described originally under Limnaa, are now 

 referred to other genera : 



Limncea decisa SAY, Nioh. Encyc., Ed. 1 and 2, pi. ii, fig. 6=Campeloma 

 decisa Say. 



Limnaa heterostropha SAY, 1. c., pi. i, fig. 6= Physa heterostropha Say. 

 Limn&a subcarinata SAY, 1. c., pi. i, fig. l=Lioplax subcarinata Say. 



