22 REPORT OF THE SECRETARY. 



1. Check lists of North American shells, by P. P. Carpenter, &c. 



2. Circular relative to collecting shells. 



3. Elementary introduction to the study of conchology, by P. P. 

 Carpenter. 



4. List of the species of shells collected by the United States ex- 

 ploring expedition, by the same author. 



5. Descriptive catalogue of the shells of the west coast of the 

 United' States, Mexico, and Central America, b}'- the same author. 



6. Descriptive catalogue of the air-breathing shells of North 

 America, by W. G. Binney. 



7. Descriptive catalogue of several genera of water-breathing fresh 

 water univalves, by the same author. 



8. Descriptive catalogue of the Blelaniadce, or the remainder of the 

 water-breathing fresh water univalves, by George W. Tryou. 



9. Descriptive catalogue of the Corbiculadce or Cijcladidce, a group 

 of bivalves principally inhabiting fresh water, by Temple Prime. 



10. Descriptive catalogue *of the Unionidce, or fresh water mussels. 



11. Descriptive catalogue of the shells of the eastern coast of the 

 United States, by William Stimpson. 



12. Bibliography of North American conchology, by W. G. 

 Binney. 



13. Check list catalogue of cretaceous and Jurassic fossils of North 

 America, by F. B. Meek. 



The first and second articles of this list were published in 1860, and 

 described in the report for that year. The third was published in 

 1861 as a part of the annual report for 1860. A new edition would 

 have been printed before this time, as a part of the Miscellaneous 

 Collections, had we not been disappointed by a delay in procuring 

 the expected u«e of wood-cuts for the illustration of the work from 

 the British Museum. We have just learned, however, that the Mu- 

 seum has liberally granted the use of these wood-cuts; that they are 

 now being copied in stereotype in England; and consequently the 

 work will be completed without further delay. 



The fourth and fifth articles are slill in the hands of Mr. Carpenter, 

 who has reported progress, which leads us to expect that they will 

 be ready for the press during the present year. 



Of the 6th, 7th, and 8th, the first draughts of the manuscripts 

 have been completed, and a preliminary sketch of the conclusions 

 of the authors as regards the names of the species has been printed 

 in the form of proof-sheets, and distributed to conchologists, with a 

 view to elicit criticisms and suggestions prior to final publication. 



