OF THE SMITHSONIAN INSTITUTION. 47 



253. Mollusks of Western America— Continued. 



Diagnoses of new forms of mollusks collected at Cape St. Lucas, Lowei* 

 California. 



Contributions towards a monograph of the pandoridaa. 



Diagnoses of new forms of moUusca from the Vancouver district. 



Diagnoses of new species and a new genus of mollusks, from the Eeigen 

 Mazatlan collection ; with an account of additional specimens pre- 

 sented to the British 3Iusoum. 



Descriptions of new species and varieties of chitonidfe and acmajidae, from 

 the Panama collection of the late Prof. C. B. Adams. 



Diagnoses of new species of mollusks from the west tropical region of 

 North America. 



Diagnoses of new forms of mollusca from the west coast of North Amer- 

 ica, first collected by Col. E. Jewett. 



Diagnoses of new forms of mollusca, collected by Col. E. .Tewett, on the 

 west tropical shores of North America. 



Diagnoses des mollusques nouveaux provenant de Californie et faisant 

 partie du Musee de I'Institution Smithsonienne. 



On the pleistocene fossils collected by Col. E. Jewett, at Santa Barbara, 

 California; with descriptions of new species. 



253. Land and Fresh Water Shells of North America. Part IV. Strepo- 



matidse (American Melaniaus). By Geo. W. Tryon, Jr. Decem- 

 ber, 1873. 8vo., pp. 490, 871 woodcuts. (M. C. xvi.) 



254. Synopsis of American Wasps. Solitary Wasps. By Henry De 



Saussure. December, 1875, 8vo., pp. 430, 4 plates of 31 figures. 

 (M.C. XIV.) 



255. The Constants of Nature. Part I. Specific Gravities : Boiling and 



Melting Points; and Chemical Formulse. By Frank Wiggles- 

 worth Clarke. December, 1873. 8vo., pp. 272. (M. C. xii.) 



256. Monographs of the Diptera of North America. Part III. By H. 



Loew. December, 1873. 8vo., pp. 381, 4 plates of 116 figures. 



(M. C. XI.) 



257. Systematic Index to List of Foreign Correspondents of the Smith- 



sonian Institution. 1872. 8vo., pp. 30. (M. C. x.) 



258. Bibliographical Index to North American Botany ; or, Citations of 



Authorities for all the recorded Indigenous and Naturalized Species 

 of the Flora of North America; with a Chronological Arrangement 

 of the Synonymy. Part I. Polypetala3. By Sereno Watson, 

 March, 1878. 8vo., pp. 484, (M. C. xv.) 



259. Explorations of the Aboriginal Remains of Tennessee. By Joseph 

 , Jones. October, 1876. 4to., pp. 181, 110 woodcuts. (S, C. xxii.) 



260. Regulations of the Smithsonian Institution. January, 1872. 8vo., 

 pp. 41, 1 woodcut. 



