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REMARKS ON THE NUMBER OF UNIONIDiE. 



Descriptions of Fifteen new species of Uruguayan UNIONIDiE. 



DESCRIPTIONS OF FOUR NEW SPECIES OF UNIONID.ffi, 

 From Brazil and Buenos Ayres. 



REMARKS ON THE COLOR OF THE UNIONID.S2. 



DESCRIPTIONS OF FOUR NEW SPECIES OF MELANIiE 

 Of the United States. 



DESCRIPTIONS OF FIVE NEW SPECIES OF UNIONES, 

 From North America. 



REMARKS ON THE FORM OF THE PALPI OF ANODONT.ZB, 

 From Uruguay. 



REMARKS ON FHYSiE IN A CISTERN. 



REMARKS ON ECHINUS PERFORATING- GRANITE. 



DESCRIPTIONS OF FOURTEEN NEW SPECIES OF SCHI- 



ZOSTOMA, &c, AND RECLAMATION OF THE NAME. 



DESCRIPTIONS OF TWO NEW SPECIES OF UNIONES, 

 From Georgia. 



DESCRIPTIONS OF THREE NEW SPECIES OF UNIONES, 

 From Mexico. 



DESCRIPTIONS OF SEVEN NEW SPECIES OF UNIONID^I, 

 From the United States. 



DESCRIPTIONS OF SIX NEW SPECIES OF UNIONIDiE, 

 From Alabama. 



Descriptions of Three new species of Exotic UNIONID33. 



Descriptions of Twenty-five new species of UNIONIDiE. 



DESCRIPTION OF A NEW SPECIES OF NERITINA, 

 From Coosa River. 



DESCRIPTIONS OF TWO NEW SPECIES OF ANODONTiE, 

 From Arctic America. 



DESCRIPTIONS OF NEW SPECIES OF SCHIZOSTOMA, &c. 



DESCRIPTIONS OF TWELVE NEW SPECIES OF UNIONES, 

 From Alabama. 



DESCRIPTION OF A NEW GENUS, (STREPHOBASIS.) 



Descriptions of Forty-nine new species of M-GLANUE. 



/ i . DESCRIPTIONS OF NEW FOSSIL MOLLUSCA, 

 yt (C^WvCjUvc^ Prom New Jersey. 



Descriptions of Eleven new species of the genus UNIO. 

 Descriptions of Seven new species of the genus IO. 



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ISAAC LEA, LL. D., &c. &c. 



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PHILADELPHIA: 

 1862. 



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