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Prof. E. D. Cope, Philadelphia. A collection of Unios, Mela- 



nijB, &c., from Virginia. 

 John Ford, Philadelphia. Beautifal suites of specimens of 



Unio nasutus, U. complanatus, U. heterodon, TJ. ochraceus, 



Margaritana undiilata, Anodonta undulata and Splicerium 



transversum. 

 Miss Anna Abbott. One good specimen of Venus intapur- 



purea, Conrad, from Florida. 

 Dr. Aug. Brot. Geneva. One hundred and forty species, nu- 

 merous specimens of land and fresh water shells. 

 J. L. Julius. Cassis, from Trinidad. 



J. H. Redfield, Philadelphia. Four species of Marginella. 

 And. J. Bennett. Twenty-three species of Unionidi^, from 



the Sciota River. 

 Jas. Lewis, M.D., Mohawk, N. Y. Four species of Amnicola, 



from Mohawk, N. Y. 

 Jacob Ennis. Vioipara Uneata, Val., from St. John's River, 



Florida. 

 Types of Rafinesque's Unios, with the original labels in his 



handwriting, were obtained from the collection of the late 



Chas. A. Poulson, by purchase. 



In addition to the above, the magnificent collection of over 

 one hundred thousand specimens, of ten thousand species, de- 

 posited by Mr. Geo. W. Tryon, Jr., has been received and in- 

 corporated with the main collection, making our cabinet richer 

 than any other in the world in specimens, and the richest in 

 species, with one exception — that of the British Museum. 



A collection of one hundred and eight species of American 

 Shells has been sent to Dr. J. C Cox, of Sydney, Australia,i •< 

 exchange for Polynesian shells, received from him. A simila. 

 collection has been sent to M. Luigi Benoit, of Sicily, and a 

 smaller one to M. Spiridione Brusina. 



The various collections received during the year have been 

 arranged, labelled and deposited in their proper places in the 

 cabinet, by Messrs. Geo. W. Tryon, Jr., Chas. F. Parker, S. R. 

 Roberts and others, Avho have devoted much time and labor to 

 the work. The proper systematic arrangement has been some- 

 what interfered with in consequence of the vcrj limited accom- 

 modation afforded our magnificent collection in our present build- 

 ing, nor can any remedy for this inconvenience be at present 

 suggested. 



Dr. S. B. Howell has kindly undertaken the arrangement of 



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