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. 



Limncea altemata Say, Bell, Rep. Prog. Can. Geol. Surv., p. 252, 1858. — 

 BlKNEYi L. & F.-W. Sh. X. A., II, p. 72, 1365.— Whiteayes, Can. Xat. & Geol., 

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



Limncea conoidea Say, H. & A. Adams, Genera Rec. Moll., II, p. 253, 1858. — 

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



Limncea corrugata Sowb., Tank Cat., p. 42, 1825. — Binney, L. & F.-W. 

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



Limncea cygmata Say, Christ}-, Journ. Conch., IV, p. 347, 1885. 



From Dufferin, Manitoba (Dawson). 



Lymnca gracilis DeKay, Cat. An. X. Y., p. 32, 1839. — Bixxey, L. & F.-W. 

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



Limncra fossaria J. de C. Sowb., Fauna Bor.-Amer., p. 316, 1836. — Binney, 

 L. & F.-W. Sh. X. A., II, p. 70, 1865.— Dall, Alaska Moll., p. 80, 1905. 



Limncea lincata Say, H. & A. Adams, Gen. Rec. Moll., II, p. 253, 1858. — 

 Bixxey, L. & F.-W. Sh. X. A., II, p. 71, 1865. 



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



Lymnea nigrescens DeKay, Cat. An. X. Y., p. 32, 1839. — Binney, L. & 

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



Lymncea ovata Lam., Hitch., Geol. Zool. Mass., p. 37, 1835. 



Limncea petitii Beck, Index, p. 113, 1838.— Bixxey, L. & F.-W. Sh. X. A., 

 II, p. 71, 1865.— Dall, Alaska Moll., p. 80, 1905. 



From Xewfoundland. 



Ompliiscola pugio Beck, Index, p. 113, 1838. — Binney, L. & F.-W. Sh. 

 X. A., II, p. 71, 1865 



From Mexico. 



Lymnea reticulata DeKay, Cat. An. X. Y., p. 32, 1839.— Bixxey, L. & F.-W. 

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



The following species, described originally under Limncra, are now 

 referred to other genera: 



Limncea decisa Say, Xich. Encyc, Ed. 1 and 2, pi. ii, fig. 6=zCampeloma 

 decisa Say. 



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



Limncea subcarinata Say, 1. c, pi. i, fig. ~=Lioplax subcarinata Say. 



