37. Conrad, T. A. Monography of the Family Unionidae. 8vo., mor., 



60 colored plates 9 00 



:^8. Deshaijex, G. P. Traite elementaire de Concliyliologie avec I'ap- 

 plicatioa de cette science a la geoguosie. 8vo , 2 vols, of text, 

 1576 pp., and one containing 13U beautifully colored plates. 

 Paris, 1839—59. (Published at $100.) 40 00 



39. Delessert, Benj. Recueil des Coquilies decrites par Lamarck, dans 



sou histoire des animaux sans vertObres. et nou encore liguri'es. 

 Large folio. Paris, 18-11. With 40 fine colored plates. (Pub- 

 lished at $80.00.) 40 00 



40. Duclos, P. L. Monographie du genre Olive. Folio, half mor., 



33 colored plates. (Published at $55.00.) 27 00 



41. Dupuy, D. Histoire Naturelle des Mollusques terrestres et d'eau 



douce qui vivent en France. 4to. Paris, 1848^51. 770 pp., 



36 plates. In splendid morocco binding 28 00 



42. Donovan, E. The Natural History of British Shells, including 



figures and descriptions of all the species hitherto discovered in 

 Great Britain. 5 vols., 8vo., bound in one, half morocco. 

 London, 1804. 180 colored plates. (Published at $60.00.) 33 00 



43. Dunker, Wm. Index Molluscorum qu£e in Itinere ad Guineam 



Inferiorum Collegit. New Edition, 4to. Cassel. With colored 

 plates 7 00 



44. Dunker, Win. Novitates ConchologicEe. Descriptions des Mol- 



lusques Marins. 10 numbers, 4to., with 30 fine colored plates. 15 00 



45. Forbes and Hanly. History of British Mollusca and their Shells. 



Illustrated by a figure of each known Animal and of all the 

 Shells, engraved on 203 copper plates. 4 vols., 8vo. (Pub- 

 lished at $50.00.) 30 00 



46. Ferussac. Tableau Systematique des Animaux Mollusques, 



classes en families naturelles. Folio. Paris, 1822 3 75 



47. Ferussac et D' Orbigny. Histoire Naturelle et particul. des Cepha- 



lopodes aeetabuliferes vivants et fossiles, contain, la descript. 

 zoolog. et anatom. de ces Mollusques. 2 vols., folio, cloth, 

 with 144 colored plates. Paris, 1835—45. (Published at 

 $200.00.) 60 00 



48. Gualtierii, Nichol. Index Testarum Conchyliorum quae asser- 



vantur in Mus. N. Gualtieri, et meth. exhib. 110 plates, folio, 

 velum. Florence,1742 8 25 



49. Gould, A. A. Mollusca of Wilkes' Exploring Expedition. 1 vol., 



4to., cloth, 500 pp. ; 1 vol., folio, J2 colored plates, morocco. 



1852 — 6. (No more copies for sale very scarce.) 43 00 



■jO. Hurtmann, J. D. W. Erd und Siiss-wasser Gasteropoden der 

 Schweiz. 8vo., morocco, 84 colored plates. St. Gallen, 

 1840—44. (Published at $30.00.) 16 00 



51. Herrmunnsen, A. F. Indicis Generum Malacozoorum primordia. 



2 vols., 8vo., pp. 1337. Cassel, 1846—55. (Published at 

 $16.00.) 10 00 



52. Flaldeman, S. S. A Monograph of the Limniades and other 



Fresh Water Univalve Shells of North America. 8vo. ,mor., 



40 tine colored plates. 1840 — 3. (Out of print.) 13 50 



