NORTH AMERICAN CONCHOLOGY. 



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Tellina Burneti = Tellidora. 



Donax cuhninatus = 'D. rostratus C. B. Adams. 



Donaz flexuosus Gould (sp. distinct.) 



Lutraria ventricosa = Mactra exoleta. 



Gnathodon trigona Pet. = G. mendicus Gould. 



Cytherea srquilatera Desh. = Trigona argentina. 



? Venus succincta Val. = Auoraalocardia subimbri- 



cata. 

 Uipponix tessellatus = H. serratus. 

 Area trapezia = A. tuberculosa. 

 Marrjaritiphora Mazatlanica = M. fimbriata Dunk. 

 Ostrea palmula (sp. distinct.) 



Naranio (sp. ined.) 



Siphonaria scquilorata == S. Lecanium. 

 Fissurella mus = Glyphis inasqualis, 

 Rissoa lirata = Barleeia lirata. 

 Terebra fulgurata = Euryta fulgurata. 



[Other important corrections and additions have not heen noticed hy me. They mast 

 be consulted by the student. Indeed, it has been impossible to quote this worli as exactly 

 as the others of my Bibliography, owing to the thoroughness of the references, compari- 

 sons, &c.— W. G. B.] 



Agassiz. — TJeber die Gattungen unter den nordamerieanis- 

 chen I^ajaden. Briefliche Mittheilung and en Herausgeber in : 

 Archiv. f. Xaturg. 18 Jahrg. 1852. 1 Bd., p. 41. 





§1. 





§2. 



Page 





Pas« 





43 



Dysnomia Ag. 



47 



Micromya Ag. 



43 



Scalenaria Raf. 



47 



Crypogenia Ag. 



44 



Truncilla Raf. 



48 



Plagiola R'f 



44 



Lampsilis Raf. 



48 



Orthonymus Ag. 



44 



Canthyria Swains. 



48 



Tritogonia Raf. 



45 



Eurynia Raf. 



48 



Quadrula Raf. 



45 



Metaptera Raf. 



48 



Rotuudaria Raf. 



46 



Alasmodonta Say. 



48 



Complanaria Sivains 



46 



Obovaria Raf. 



49 



Pleurobema Raf. 







49 



Uniopsis Swains. 







49 



Margaritana Sch. 







50 



Hemilastena Raf. 



[The above is a very imperfect riuotation of the paper, which must be consulted by tho 

 student.— W. G. B.] 



