EXPLANATION OF PLATES. 331 



43. Bulimulus lima Reib. (chemnitzioides). Isis., . . 125 



44. Bulimulus chemnitzioides Forbes. Pilsbry, del., . 124 

 45,46. Bulimulus chemnitzioides Forbes. Conch. Cab., . . 124 

 47,48. Bulimulus chemnitzioides Forbes.. P. Z. S., . .124 



49. Bulimulus undescribed species. P. A. N. S., . . .123 



PLATE 25. 



50. Bulimulus alternatus Say. Moll. Mex., . . . 134 

 51,52. Bulimulus alternatus Say. Terr. Moll., Ill, . 134 



53. Bulimulus alternatus Say. Terr. Moll., IV, . . 134 



54. Bulimulus artemisia W. G. B. P. U. S. N. Mus., . . 152 



55. Bulimulus dealbatus mooreanusW. G. B. Terr. Moll., IV, 130 



56. Bulimulus beldingi Cooper. Specimen, .... 149 



57. Bulimulus pilula W. G. B. L. & F.-w. Sh. N. A., 138 



58. Drymseus parvus Lea. Type specimen, . . See Vol. XII 



59. 60. Drymseus trigonostomus Jonas. Apex and greatly en- 



larged detail of sculpture, ..... 256 



61. Bulimulus corseformis Pils. Type, Pilsbry, del., . . 15 



62. Drymseus navicula Wagn. Apex, Pilsbry, del., . 186 



63. Bulimulus suffiatus v. chinchensis Coop. Proc. Cal. Acad., 137 

 64-66. Bulimulus baroni Fulton. Ann. Mag. N. H., 172 



PLATE 26 (Bulimulus, Drymcsus). 



67-69. Bulimulus punctulifer Sowb. C. Icon., . . .317 



70. Drymseus polygrammus Moricand. Pilsbry, del., . 252 



71, 72. Drymseus flavidus Mke. Binuenmoll. Venez., . . 310 



73. Drymreus flavidus Mke. Fer., Hist., . 310 



74, 75. Drymseus debilis Beck. Fer., Hist., . 311 



76. Drymseus amandus Pfr. P. Z. S., . 313 



77, 78. Drymseus borellii Anc. Boll. M. Z. Torino, . 279 

 79, 80. Bulimulus mendozanus var. azulensis Doer. Exped. 



Rio Negro, ... . .319 



81,82. Bulimulus heterogrammus Moric. Mem.Genev., . 321 



83, 84. Drymseus virginalis Pfr. Binnenrnoll. Venez., . . 309 



85. Bulimulus corseformis Pils., Apex, . . 317 



86. Drymseus heynemanni, see vol. XII. 



87. Drymseus virginalis Pfr. Specimen, . 309 



PLATE 27 (Zaplagius). 



16-19. Drymseus navicula Wagn. Specimens, . 186 



20-23. Drymaaus involutus Mart. C. Mittheil., .187 



24-27. Drymseus uranops Pils. Specimen, 



28, 29. Drymseus lateralis Mke. Specimens, . 



30. Drymseus lateralis Mke. Conch. Icon., 



31-33. Drymseus lateralis var. Conch. Cab., . 189 



