4.23 
Lea, Isaac. Observations on the Naiades, and Description of New Species of that and other Families. 18 colored 
Plates. Philadelphia: 1830. 
Supplement. 3 colored Plates. Philadelphia: 1831. 
Description of a New Genus of the Family Melaniana of Lamarck. Philadelphia: 1831. 
All the above are bound together and form vol. Ist. 
——_——— Observations on the Naiades and Descriptions of New Species of that and other Families. 7 colored 
Plates. Philadelphia: 1832. 
————— st Supplement. 6 colored Plates. Philadelphia: 1833. 
————— _ 2d is 6 colored Plates. Philadelphia: 18384. 
The above form volume 2d. 
——_——— Continuation of Mr. Lea’s Paper. Philadelphia: 1835. 
Ts « “ the 1835. 
—————— :: ss ‘ 8 colored Plates. s 1836. 
——_—_——. < ai a s 1836. 
¢ « 6 colored Plates. 1836. 
“ es se SH eS s° * 1837. 
‘ MG ss 1 < i 1837. 
—_—. a5 us: 6 - 1838. 
—_—_——. as ee is Sf 1838. 
—_—— st & a Synopsis of the Family Naiades. 
Geographical Distribution of the Species of the Family Naiades. 
The above form volume 3d. 
————— Description of Nineteen New Species of Colimacea. Read February 21st, 1840. 2 colored Plates. 
Philadelphia. 
—-— Descriptions of New Fresh Water and Land Shells. Read December 21st, 1838. 
Continuation. Read October 2d, 1840, 
— a : « January 15th, 1841. 
« February 19th, 1841. 
= a « June 18th, 1841. 
ss “ October 21st, 1842. 
s « December 16th, 1842. 
d “May 2d, 1845. 
Notice of the Oolitic Formation in America, with Descriptions of some of its Organic Remains. 3 
Plates. May, 1840. 
Leonarp, B. G. A Discourse before the Chilicothe Lyceum and Mechanics’ Institute. 1834. See Pamphlets, 
vol. 3d. 
Lesson, R. P. Illustrations de Zoologie ou choix de figures peintes d’aprés nature des espéces inédites et rares 
d’animaux recemment decouvertes et accompagnées d’un texte descriptive, general et 
particulier. 8vo. Plate, color, Paris: 1831. 
Linné, C. Systema Nature, sive Regna tria Nature. See Gmelin. 
Lisrrr, M. Historia Animalium Anglie tres tractatus. Unus de Araneis. Alter de Cochleis tum Terrestribus 
tum Fluvatilibus. Tertius de Cochleis Marinis. Small 4to. 9 Plates. With manuscript notes by 
Dr. Goodall, Provost of Eton. London: 1678. 
Historia Conchyliorum Oxonii. With Indexes by Huddesford and Dillwyn. 1059 Plates, and 22 
additional Plates, chiefly anatomical. Folio. Oxonie: 1770. 
Lone, 8S. H. Narrative of an Expedition to the Source of St. Peter’s River, Lake Winnepek, Lake of the Woods, 
&c. Performed in the year 1823. With an Appendix on Zoology. By T. Say. 2 vols. 8vo. 
Philadelphia: 1824. 
