SPURIOUS AND UNIDENTIFIABLE SPECIES. 



The following pages include a list, with notes, of all the unidenti- 

 fiable and spurious species of North American Lymnaeas. Some of 

 these names were founded on foreign species erroneously referred 

 to America, several have been ascertained to belong to other families 

 while a large number are nude names of which no description has ever 

 been published. The list is quite extensive and it is believed that all 

 of the questionable species are recorded. 



Limnaea bombycina Lungfe. 



Limncsa bombycina LUNGE, WOOD, Nautilus, V, p. 56, 1891. KEEP, West 

 Amer. S'h., p. 314, 1904. 



Mr. William J. Raymond, of Oakland, California, has kindly 

 given the following information concerning this reference: 



"The name was inserted in our list of 'Mollusks of San Francisco 

 County' by Mr. Wood. I do not know the species, but am under the 

 impression that we thought it, or rather Mr. Wood, an oriental species, 

 introduced into San Francisco, perhaps with living fish or aquatic 

 plants. The describer was probably Dr. De Lunge, an eccentric col- 

 lector, who died several years ago. His collection, or a part of it, 

 is now in possession of the University of California, of which I am a 

 member." No other information has been obtained concerning this 

 species. As no description was published it must fall into the list of 

 nude names. 



Limnaea elliptica "Lea" Sowerby. 



Limnaa elliptica LEA, SOWERBY, Conch. Icon., XVIII, Limn., sp. 61, pi. 9, 

 fig. 61, a, b, 1872. 



Mr. E. A. Smith has informed Mr. Bryant Walker that the orig- 

 inal specimens of this species, in the British Museum, quoted by Sow- 

 erby from Lake Madison, Michigan, are a form of Succinea from Lake 

 Madison, Wisconsin. The name elliptica Lea is an error of Sowerby's, 

 for Lea never described a Lymnsea of that name. There is a Physa 

 elliptica Lea, and this is possibly the name Sowerby had in mind. 



Lymnea heterostropha C. B. Adams. 



Lymnea heterostropha, C. B. ADAMS, Amer. Journ. Sci., XXXVI, p. 392, 

 1839. BINNEY, L. & F.-W. Sh. N. A., II, p. 70, 1865. 



This may have been a lapsis pennae for Physa heterostropha, but 

 as the latter species is also mentioned, it is quite impossible to know 

 just what species was in the mind of Prof. Adams. 



