OF CONCHOLOGY. 229 



May IZth. — To Luigi Benoit, Messina, letter of acknowledg- 

 ment. 



3Iay 21st— To Dr. H. E. v. Rijgersma, St. Martins, W. I., 

 soliciting collections. 



To W. B. Pryor, Esq., Shanghai, China, soliciting collections. 



June 11th. — To Prof. Joseph Henry, Smithsonian Institution, 

 soliciting publications. 



June 2'2d. — To the Society Malacologique de Belgique, Brux- 

 elles, exchange of publications. 



To E. A. Bielz, Hermannstadt, Transylvania, exchanges. 



To Bulletino Malacologico Italiano, Pisa, for exchange of 

 publications. 



Jutie 23(^. — To B. J. Lechmere Guppy, Trinidad, exchange 

 of specimens. 



Nov. 5. — To Sylvanus Hanley, Middlesex, England, letter of 

 acknowledgment. 



The following letters have been received ; 



Dec. 29th, 1868. — M. de Malzine, Bruxelles, with publica- 

 tions. 



Mons. Terver, Lyons, France, acknowledgment of election. 



Dr. Leopold von Schrenck, St. Petersburg, with publications. 



Jan. 1th, 1869. — D. F. Heynemann, Frankfort, with publi- 

 cations. 



Arthur Morelet, Dijon, France, letter of acknowledgment. 



Mons. H. Crosse, Paris, with publications. 



Frederick Calliaud, Nantes, France. 



Feb. 4cth. — J. R. Bourguignat, acknowledgment. 



Feb. IQth. — F. M. Souverbie, Bordeaux, acknowledgment of 

 election. 



Capt. J. Mitchell, Madras, with publications. 



March 4th. — L. H. Abbott, Boston, letter of acknowledg- 

 ment. 



Philip Lutley Sclater, London, letter of acknowledgment. 



Zoological Society, London, letter of acknowledgment. 



March oOth. — F. de Malzine, Brussels, proposals for ex- 

 change. 



May 6th. — B. Westermann & Co., New York, publications. 



S. L. Abbott, Boston, with publications. 



E. C. Bolles, Portland, Me., acknowledgment of publications. 



Leon Vaillant, Paris, acknowledgment of election. 



Philip Lutley Sclater, London, acknowledgment of publica- 

 tions. 



L. Chenu, Paris, acknowledgment of election. 



