SYNOPSIS OF THE NAIADES— SIMPSON. 



515 





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(Bosauorhamplius.) 



Beak sculpture generally zigzag- 

 radial; epidermis often bright. 



{LampTiorJiamphus.) 



Beak sculpture radial, often curved; 

 shell dull colored. 



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Hinge teeth taxodont; male and female shells 

 alike ; embrj'o a lasidiuvi. 



I 



Nodularia Conrad. 

 Harmandia Eocbebrune. 

 Grandidieria Bourguignat. 

 Physuiiio Simpson. 

 DalUella Simpson. 

 Pseudodon Gould. 

 Parreysia Conrad. 

 PtychorJiynclms Simpson. 

 Virgus Simpson. 

 Ctenodesma Simpson. 

 Beclidens Simpson. 

 LameUidens Simpson. 

 Trapezoideus Simpson. 

 Arconaia Conrad. 

 Psendavicida Simpson. 

 Arcidopsis Simpson. 



f Tetraplodon Spis. 

 Castalina von Ihering. 

 Castaliella Simpson. 

 Callonaia Simpson. 

 Uyria Lamarck. 

 Prisodon Schumacher. 

 Diplodon Spix. 



' Spatha Lea. 



Mntela Scoisoli. 



Chelidonopsis Ancey, 



Brazzwa Bourguignat. 



Pleiodon Conrad. 



Monocondyhra d'Orbigny. 



Iheringella Pilsbry. 

 I FossitJa Lea. 



Glaharis Gray. 



Leila Gray. 

 l^ Mycetopoda d'Orbigny. 



Ill the iireparation of this work I liave received uniform courtesy and 

 kindness from students and collectors generally. I am under especial 

 obligations to Mr. Edgar A. Smith, of the British Museum, for exam- 

 ining and reporting on the original manuscript of Solander, and to Mr. 

 H. A. Pilsbry, of the Academy of Natural Sciences of Philadelphia; 

 Mr. A. G. Wetherby, of Magnetic City, .North Carolina; Dr. H. von 

 Ihering, Museo Paulista, San Paulo, Brazil; and Mr. H. Suter, Christ 

 Church, New Zealand, for repeated assistance and advice. Mr. L. E. 

 Daniels, of La Porte, Indiana; Mrs. George Andrews, of Knoxville, 

 Tennessee; Hon. J. D. Mitchell, of Victoria, Texas; Mr. Berlin H. 

 Wright, of Penn Yan, New York; Mr. Bryant Walker, of Detroit, 

 Michigan; Dr. W. S. Strode, of Lewistown, Illinois; Mr. H. M. Kelly, of 

 Mount Vernon, Iowa; Mr. William Moss, of Ashton-under-Lyne, Eng- 

 land; and many others have contributed valuable material for study^ 



