142 INDEX AND SYNONYMY. 



PAGE. 



Oblonga (Navicella tessellata, Lam. var.), Martens. Kiist. p. 



38, t. 8, f. 1-3, 82 



Oblonga (Neritina virginea, L. var. ), Martens. Mai. Bliitt., 



xii, p. G3. = N. virginea, Linn. . . . . .40 



Obscura (Neritina), Dunker. Catal. von Godeffroy coll. 



= N. retropicta, Mat-tens, ....... 67 



Obscnra (Nerita), Honibr. et Jacq. Voy. Astrolabe et Ze- 



lee, V, p. 65, pi. 17, f. 1-2. :=: N. picea, Reclnz. . . 33 



Obscurata (Neritina), Reel. Rev. Zool., p. 183, 1842. 



= N. brevispina. Lam. ....... 65 



Obtusa (Neritiua), (Bens.) Reeve. Conch. Icon., f. 116. 



= N. retropicta. Martens. ....... 67 



Obtusa (Neritina), Benson. Jour. As. Soc., x, 1836, p. 749, . 43 

 Obvoluta (Cyclostrema), A. Adams. Ann. and Mag. Nat. 



Hist., 1860, . . . . • 106 



Octolyrata (Cyclostrema), Carpenter. P. Z. S., 1856, p. 169, . 99 

 Odontostoma (Klein, 1758), Morch. Cat. Yoldi, 167, 1852, 5, 30 

 Oleagina (Nerita), Reeve. Conch. Icon., f. 47. 



= N. Spengleriana, Reclnz 29 



Olivacea (Neritina), Wiegmann. ]\[us. Berlin. 



= N. reclivata. Say 39 



Olivacea (Neritina), Recluz. P. Z. S., 1842, p. 172, . . 69 

 Olivieri (Neritina), ]\rartens. Conch. Cab., 86. 



= N. anatolica, Reel., var. ....... 52 



Omalos (Discopsis), Folin. Fonds de la Mer., i, 190, 205, 



1860, 105 



Ouiatum (Cyclostrema Dalli, Verrill, var.), Verrill. Trans. 



Conn. Acad., iii, p. 255, pi. 32, f. 17, . . . . .97 

 Onalaniensis (Neritina). Less. Voy. de la Coquille, ii, pt. I, p. 



379, 41 



Oncochilus, Petho. 1882. 9 



Orbella (Adeorbis), A, Ad. Ann. and Mag. Nat. Hist., 245, 



1861, 83 



Orbicularis (Navicella), Rve. Conch. Icon., f. 5, 1856. 



= N. suborbicularis, Sowb. ....... 81 



Orbignyana (Nerita), Recluz. Rev. Zool., 1841, p. 108. 



= N. polita, Linn 30 



Orbignyi (Adeorbis), Fischer. Jour, de Conch., vi, 286, 1857, 86 

 Orientalis (Navicella), Reeve. Conch. Icon., f. 33. 



= N. cferulescens, Reel. ....... 82 



Orbis (Vitriuella), Carp. Mazat. Cat.. 247, . . . .103 



Ornatus (Catillus), Adams and Angas.- P. Z. S., 1864, p. 36. 



= Navicella Bougainvillei, Reel. . . . . .80 



Ornata (Nerita), Sowb. Gen. Shells, no. 10. 



= N. scabricosta, Lam. ....... 30 



Ornata (Neritina), C. B. Adams. Contr. to Conch., vii, 1850, 



p. 112, . . , 56 



Ornata (Vitrinella), Carp. Zool. Proc, 270, 1865. . . 103 



