REFERENCE TO PLATES. 457 



FIGURE. PAGE. 



36. Potamides Owenii, Fer. (= radula). Ibid., f. 5, . . 159 



37. Potamides multigranosus, Sowb. ( homologum). Ibid., 



f. 6, . . . . 159 



38. Potamides fluviatilis, Pot. et Mich. Ibid., f. 9a, . . 159 



39. Potamides micropterus, Kiener ( fluviatilis). Ibid., f. 7b, 160 



40. Potamides retifera, A. Ad. (= fluviatilis). Ibid., f. 1, . 160 



PLATE 32. 



41. Potamides palustris, Linn. Sowb. Thes., f. 261, . . 160 



42. Potamides. Operculum. Conch. Icon. Pyraz., f. 2b, . 160 



43. Potamides Caledonicus, Jouss. Specimen. . . . 160 



44. Potamides Caledonicus, Jouss. Bull. Soc. Zool. France, 



ix, t. 4, f. 12, 160 



45. Potamides semisulcatus, Morch. Kiener, Iconog., t. 27, fl, 160 



46. 47. Potamides sulcatus, Born. Conch. Icon. Pyraz., f. Ib, 160 



48. Potamides Gourmeyi, Crosse. Ibid., f. 3, . . .160 



49. Potamides alatus, Phil. Ibid., f. 10, . . . . 160 



50. Cerithidea pulchra, Ads. Conch. Icon. Cerithidea, f. 29, 161 



51. Cerithidea incisa, Hombr. et Jacq. Voy. Astrol. et Zel. 



t.23, f. 8, . . . ... . . . 160 



52. Cerithidea euryptera, A. Ad. Conch. Icon. Tymp. f. 8, b. 160 



53. Cerithidea Kieneri, Hombr. et Jacq. Ibid. Cerithidea, f. 



6, 161 



54. Cerithidea decollata, Linn, Ibid. f. 14, b. 161 



55. Cerithidea cornea, A. Ad. Ibid. f. 21, . . . . 162 



PLATE 33. 



56. Potamides telescopium, Linn. Thes. Conch, f. 269, . 161 



57. Cerithidea Montagnei, Orb. Conch. Icon. Cerithidea, f. 



26, 161 



58. Cerithidea varicosa, Sowb. ( fortiusculum) Ibid. f. 19 



a . 161 



59. Cerithidea obtusa, Lam. Voy. Astrol. et Zel. t. 24, f. 3, 161 



60. Cerithidea obtusa, Lam. Conch. Icon. Cerithidea, f. 40, 161 



61. Cerithidea Kieneri, Hombr. et Jacq. Voy. Astrol. et 



Zel. t. 24, f. 4, 161 



62. Cerithidea Quoyi, Hombr. et Jacq. Ibid. t. 23, f. 6, . 162 



63. Cerithidea quadrata, Sowb. (= obtusa.) Conch. Icon. 



Cerithidea f. 5, 161 



64. Cerithidea ornata, A. Ad. Ibid. f. 22, b. 162 



65. 66 Cerithidea Fortunei, A. Ad. Ibid. f. 15, a. b. . 162 



67. Cerithidea rhizoporarum, A. Ad. Ibid. f. 13, a. . . 162 



68. Cerithidea Morchii, A. Ad. Ibid. f. 18, ... 163 



69. Cerithidea sacrata, Gould. Ibid. f. 7, . . . .162 



70. Cerithidea Mazatlanica, Carp. (= sacrata). Ibid. f. 8, .162 



71. Cerithidea pullata, Gld. (=sacrata). Pacific. R. R. Re- 



port, v, t. 11, f. 23, 162 



