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Obrium, Dejean, CataI. Coléopt. 1821, 110 [no n.]. 

 Odostomia, J. Alder, Ann. Mag. N. H. XIII. May 1 8 44, 327. 

 Omalisus, T. Say, Boston Journ. N. H. I (2) 1835, 156. 

 Onthophagus (01.), J. C. F. Klug in Erman, Reise Erde, Atlas, 18 35, 
3.- 

 Scarabaeus, 1789. 

 Opilio, C. L. Koch, Uebers. Arachnidensyst. II. 18 39, 33. 

 Oscinis, J. Macquart (Roret's Suite à Buffon), Diptères, II. 1835, 601. 

 Ostrea, Lamarck, An. s. vert. VI (I) 1819, 220. 

 Otodus, J. L. R. Agassiz, Poiss. Foss., Feuilleton, 114 ( 18 3 8 ); III., 267 (1843). 

 Oxytes, C. G. Giebel, Fauna d. Vorwelt, I (3) 1848, 364. 

 Pachycoris, E. F. Germar, Zeitschr. f. d. Entom. I (I) 18 39, 94. 

 Panopaea, A. d'Orbigny, Pal. Franç., Crét. III (Lam.) 18 45, 327. 

 Pecten, J. Sowerby, Min. Conch. IV. 1822, 95. 

 Pecten, Young & Bird, GeoI. Surv. Yorksh. Coast, ed. 2, 1828, 237. 

 Pecten, P. M. T. de Serres, Geogn. Terr. tert. 1829, 132. 

 Pectunculus, Defrance, Diet. Sci. Nat. XXXIX. 1826, 224. 

 Pectunculus, A. Andrzejovski, Bull. Soc. Imp. Nat. Moscou, IV. 1832,566 [no n.]. 

 Pectunculus, I. Lea, Contrib. to Geo1. 1833, 78. 

 Pectunculus, G. v. Muenster, N. Jahrb. f. Min. 1835, 438. 

 Pectunculus, L. Reeve, Conch. lcon.-Pectunculus, no. 33, Ap. 1843. 

 Pectunculus, T. Brown, Ill. Foss. Conch. G. B. I. [1845-9], 189. 

 Perna, Lamarck, An. s. vert. VI (I) 1819, 140. 

 Perteretum, C. D. E. König, leones foss. 1825, pI. 17 [no et j.]. 

 Philopotamus, J. F. Stephens, Syst. Cat. Brit. Ins., Aug. 1829, 318 [no n.]. 

 Pholadomya, J. L. R. Agassiz, Etudes crit. Moll. foss. (2) ii, 1845, 110. 

 Pisidium (Lam.), C. Pfeiffer, Naturg. deutsch.land-Moll. (I) 1821, 124.-Cyc1as. 

 Planorbis, J. E. De Kay, N. H. New York (Moll.) 1843, 62. 

 Planulina, C. G. Ehrenberg, Ber. Verh. k. pro Ak. Wiss. 18 45, 373. 

 Pleureterites, C. S. Rafinesque, Atlantic Journ. (4) 1832, 143. 

 Pleurotoma, I. Lea, Contrib. to Geol. 1833, 136. 

 Pleurotoma, H. E. Anton, Verz. Conch. 1839, 73. [Spondylus. 

 Plicatula (Muenst.), A. d'Orbigny, Prodr. Paléont. I. 1849 [Jan. 1850], 202.- 

 Pneumora, C. P. Thunberg, K. Vet. Ac. Nya Handl. XXXI (I) 1810, 65. 

 Poecilodus, J. L. R. Agassiz, Ann. Mag. N. R. VII. 1841, 496 [no n.]; Poiss. 

 Foss. III., 174 (1843) [no n.]. 

 Pollicipes (Q. & G.), H. 1\1. Edwards in Lamarck, H. N. Anim. s. Vert., ed. 2, V. 

 Dec. 1837, 680.-Anatifa. 

 Polypothecia, E. Benett, CataI. Org. Rem. in Hoare, Hist. Wiltshire, 1831, 

 pI. viii [no et j.]. 

 Prisodon, C. F. Schumacher, Overs. K. Danske Vid. Selsk. Forhandl. 1816, 

 Prisodon, C. F. Schumacher, Essai Vers test. 1817, 139. [7 [no n.]. 

 Pyrrhocoris, Herrich-S., Wanzenart. Ins. VII (2) Sept. 1843, 19. 

 Reticulipora, A. d'Orbigny, Rev. et Mag. de Zool. (2) II. Feb. 1850, 113. 

 Saperda, T. Say, J. Acad. Nat. Sci. Philad. V. Nov. 1826, 274. 

 Scaeva, T. Say, J. Acad. Nat. Sci. Philad. III. June 1823, 89. 

 Scalaria, G. B. Sowerby, II., Thes. Conch. I (4) ante II Ap. 1844, 89. 

 Scaphites, J. Sowerby, Min. Conch. I. 181 3, 54. 

 Sciomyza, F. Walker, List Dipt. ColI. B. M. (4) 1849, 1070. 

 Sciophila, T. Say in Keating, Exp. Peter River, II. 1824, 363; & ed. London, 

 Scymnus, Gené in Comolli, De coleopt. Novocomi, 1837, 52. [1825 (App.), 92. 

 Scyphia, G. A. Goldfuss, Petref. German. I (I) 1826, 9. 

 Sertularia (Lamx.), H. M. Edwards in Lamarck, H. N. Anim. s. Vert., ed. 2, II. 

 Aug. 1836, 154.-Dynamena. 

 Solen, J. De C. Sowerby, Min. Conch. VII. 18 44, 75. 

 Spondylus, G. v. Muenster, Beitr. zur Petref. (4) 184 1 , 74. 

 Spondylus, J. C. Chenu, Illustr. Conch. II. Spondylus, 18 44-5, 7. 

 Stenelophus, V. v. Mochulski, Kaefer RussI., þost May 1850, 22. 

 Stenus, O. Reer, Coleopt. Helvet. (2) 1839, 224. 



