BO Cincinnati Society of Natural History. 



can send about one linnclred and lifty species from this unrivaled 

 locality; all of them will be thoroughly identified and properly labeled. 

 In each collection will be sent vertical and longitudinal sections, for 

 microscope, of several species of the " corals." We have, also, in this 

 department, perfect casts, in duplicate, of the celebrated fossil horn 

 cores of the Bison latifrons (Leidy); the original cores belong to us. 

 They were found in Adams county, in 1869, in coarse gravel, fifteen 

 feet below the surface; they each have a portion of the skull attached, 

 one portion showing a part of the brain cavity. The dimensions are 

 as follows: length of right core, 2 feet, 8 inches; length of left core, 2 

 ft., 7 inches; breadth of forehead, 1 ft., 4 inches; spread of cores in 

 direct line, 6 ft., 1 inch; circumference at base, 20^ inches; circum- 

 ference at 24 inches from base, 9^ inches; weight, 32 and 34 lbs. 

 They are of moderate curvature, deeply corrugated, nearly perfect, in 

 a good state of preservation, and have been most successfully molded. 

 They are offered in exchange, at the nominal value of twenty dollars. 

 Books or specimens of natural history will be received in exchange, at 

 above rate. 



2. Mineralogy. — In this department we have a very large and valu- 

 able collection of duplicates. Pei-sons desirous of making exchanges 

 would greatly assist in "making up a box" by sending a list of what 

 is desired, and also inclosing with application, a list of what they can 

 furnish. This suggestion applies equally to all the departments. 



3. CoNCHOLOGY. — We have a good selection, in duplicate, of marine 

 shells. Our list of land and fresh-water shells is quite complete, 

 especially so from this locality. They will be carefully named. 



4. Books. — In our library, we have a \evy large number of New- 

 berry's Ohio Geological Survey, complete in 4 vols., with maps: Vol. 

 I,, Geology; Vol. I., Palaeontology; Vol. II., Geology; Vol. II., Pala?on- 

 toloo■3^ Also, Ohio Agricultural and Centennial llejjorts ; 1 set 

 Pennsylvania Geological Reports ; 2d report, by Leidy; 1 seiCuvier's 

 Animal Kingdom., 3 vols. 



We have some specimens in entomology, archtBology, and botany. 

 We desire specimens for these departments, as also for microscop}^ 

 ichthyology, herpetology, and comparative anatomy in general. 

 Persons wishing to exchange will please communicate with the 

 corresponding secretary, J. W. Hall, Jr., 108 Broadway, who will 

 promptly hand the matter over to the proper curator. 



