18 



REPORT ON THE CONCHOLOGICAL AND PAL^EONTO- 

 LOGICAL DEPARTMENTS. 



By Charles E. Hamlin. 



Since the last annual report a very important addition has been 

 made to the collections of Fossil Invertebrata by the acquisition 

 of the great collection of Bohemian Fossils of Primordial, Lower 

 Silurian and Upper Silurian age, made by the late J. M. von 

 Senary, of Prague, and purchased from his heirs. The speci- 

 mens, which are of the finest quality and in perfect condition, 

 number more than one hundred thousand (100,000), and repre- 

 sent one hundred and fifty-seven, (157) genera and twelve hundred 

 and thirty-one (1231) determined species, besides many species 

 still undetermined. 



A collection of fossils from the beds of Lithographic Slate at 

 Solenhofen in the district of Pappenheim, Bavaria, has been 

 bought and received from Ernst Haeberlein of Pappenheim. It 

 is made up in about equal proportions of Vertebrata and Inver- 

 tebrata. 



The work of selecting, determining, and mounting recent and 

 fossil Lamellibranchiata for exhibition, begun previously to the 

 last report, was interrupted by my departure to Europe on busi- 

 ness connected with the Schary collection. It has been resumed 

 since my return, and will soon be completed. 



In consequence of my absence and the pressure of other work, 

 conchological exchanges have this year been almost wholly sus- 

 pended. The large stock of Achatinellae from the Pease collec- 

 tion has been sent for study to Wm. D. Hartman, M.D., of West 

 Chester, Penn., who is engaged in monographic work upon that 

 obscure genus. 



