82 



ANODONTA. 



Eh 



is 

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P3 

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 15 



WIDE. 



*Marryatana. Ze«. 

 An. subinflata. Antli. 



elongata. Swain. Han. 



*ensiforrnis. Spix. D'Orb. Schom. 

 Kiist. H. & A. Adams. Han. 

 Lamproscapha ensiformis. Chenu. 



*cylindracea. Lea. Han. 



*subcylindracea. Lea. Linsl. Dekay. 

 Stimp. Han. 



lucida. I)' Orb. 



*Buclianensis. Lea. Han. 



*Senegalensis. Lea. 



*Dahomeyensis. Lea. 



^gracilis. Lea. 



* Wheatleyi. Lea. H. Adams. 



*Amazonensis. Lea. 



*exilis. 1 Lea. Han. 

 An. polita. Mouss. 

 An. siliqua. Kiist. 



WIDE. 



*Schr6teriana. Lea. Hupe. 



OBOVATE. 



*obtusa. Spix. Kiist. Mori. Hupe. 

 An. lituratum. Spix. 



Montezuma. Lea. 



*trigona. 2 Spix. D'Orb. Kiist. 



*sirionos. 3 D'Orb. Hupe. Mart. 

 An. Ferrarisi. HOrb. 



*Patagonica. Lam. Kiist. Mart. 



*lato-marginata. 4 Lea. HOrb. Von 

 Mar. 

 An. trapezeusP Spix. 

 An. exotica? Guv. 

 An. membranacea. 6 D'Orb. Hupe. 

 Patularia rotunda. Sivain. 

 Patularia lato-marginata. Chenu. 



*Spixii. D'Orb. 



An. rotundus. Spix. Kiist. 

 An. trapezium. Mori. 



porcifer. 7 Gray. 



*trapezialis. Lam. Blain. Pot. Kiist. 

 Hupe. Mart. 



1 Prof. Kirtland informed me that he received this shell from Wallingford, Conn., taken from some 

 of the branches of the Quinipiak River, but I think this must be an error. When I described it, I 

 mentioned having purchased it of Mr. Warren, a dealer in Boston, who could give me no idea whence it 

 came. I never supposed it to be an American species, and my conclusion is justified, I think, by having 

 received the same species from Dr. Vondembusch, of Bremen, he having procured it from Java. 



2 Ferussac considered trigona the same as crassa, Swainson. The two figures, however, appear to 

 me to be too different to be considered the same. 



3 The specimen sent to me by M. D'Orbigny under the name of sirionos does not correspond with 

 his figure in Voy. Am. Bier., PI. 74, Figs. 4-6, and PI. 80, Figs. 1 and 3, which I think are drawn from a 

 lato-marginata, Lea; but it is, I think, the same as trigona, Spix. 



4 The Patagonica and lato-marginata, when they are better observed, may prove to be the same. 



6 Spix's figure so closely resembles the lato-marginata, that I scarcely feel a doubt as to their being 

 the same. He does not, however, notice the broad margin which is so characteristic of this species. 

 6 See note 4, p. 55. 

 ' Never having seen this species, I place it here on Dr. Gray's authority. Pro. Zool. Soc. 1834, p. 58. 



