CONTENTS. 



\ 



/' PAQE 



1. Descriptions of American Land Shells. From Proc. Philadelphia 



Acad. Nat. Sci , 1857, p. 18, 19 1 



-, 2. Notes on American Land Shells, No. 2, from same, p. 183 — 193 . 3 

 3. Notes on American Land Shells, deposited by Mr. Say, and still pre- 

 served in the collection of the Academy, from same, p. 192, 193 . 13 

 >v 4. Notes on American Land Shells, No. 3, from same, 1858, p. 114 — 116 15 

 I V 5. Notes on American Land Shells, No. 4, from same, 1858, p. 197 — 211 19 

 • v' 6. Notes on American Land Shells, No. 5, from same, 1859, p. 188, 189 35 

 , ^ 7. Notes on Geographical Distribution of N. A. Terrestrial and Fluvi- 



atile Gasteropods, from same, 1860, p. 49, 50 37 



8. Notes on American Land Shells, No. 6, from same, 1860, p. 150 — 154 39 



9. Descriptions of New Species of Pulmonata in the Collection of the 



Smithsonian Institution, from same, 1860, p. 154 . . . .43 

 10. Catalogue of the Terrestrial and Fluviatile Gasteropods inhabiting 



the Continent of North America, from Smithsonian Miscellaneous 



Collections. Distributed, in form of proof, about 1860, p. 15 . 44 

 / 11. Second edition of last appeared as Check List of the Shells of North 



America. Terrestrial Gasteropoda, pp. 6, 1860 ; and, also . . 45 

 y- 13. Check List, &c. &c., Fluviatile Gasteropoda, 1860, pp. 7 . .51 

 13. Catalogue of Land and Fresh-water Univalve Mollusks collected in 

 British America, by Messrs. Ross, Kennicott, and Drexler, and de- 

 posited in the Smithsonian Collection, from Proc. Philadelphia 



Acad. Nat. Sci., 1861, p. 330 59 



Notes on the Terrestrial Mollusks of the Peninsula of California, 

 from same, 1861, p. 331— 333, with wood-cuts .... 60 



Synopsis of North American Limnseidfe. Distributed in form of 

 proof-sheets only, as part of Smithsonian Collections, May 4, 1863, 



pp. 7 63 



Synopsis of Air-breathing Mollusks of North America, published 



like the last, Dec. 9, 1863, pp. 13 71 



Note on the Jaws of Helices, from American Journal of Conchology, 



I. 47, pi. vi., 1865 93 



Description of the genus ArioUmax, Morch, from same, p. 48, pi. vi. 94 

 Descriptions of New Species of North American Land and Fresh- 

 water Shells, from same, p. 49— 51, pi. vii. . . . . .95 



Synopsis of Invertebrata of Massachusetts, May, 1868, pp. 14 . 103 



The Mollusks of our Cellars, from American Naturalist, Vol. IV., 



p. 166—171, wood-cuts, May, 1870 118 



