328 EXPLANATION OF PLATES. 



PLATE 16 (JVcesiotus). 



26, 27. Bulimulus achatellinus Forbes. P. Z. S., . . 99 



28, 29. Bulimulus achatellinus Forbes. Conch. Cabl, . . 99 

 30,31, Bulimulus achatelliuus Forbes. Specimen, . . 99 



31, 32. Bulimulus nux Brod. Specimens, .... 100 



33. Bulimulus nux Brod. Conch. Icon., . . . .100 

 34-38. Bulimulus nux Brod. Isis., ..... 100 



39. Bulimulus nux v. verrucosus Pfr. Isis., .... 102 



40, 41. Bulimulus nux v. asperatus Alb. Novit. Conch., . . 102 

 42, 43. Bulimulus nux v. incrassatus Pfr., Conch. Cab., . . 102 

 44, 45. 'Bulimulus nux v. incrassatus. Specimen, . . . 102 

 46,47. Bulimulus rugulosus So wb. Conch. Illustr. , . . 103 



48. Bulimulus planospira Ancey. P. A. N. S., . . 104 



49. Bulimulus ustulatus Sowb. Conch. Illustr., . . . 104 



50. Bulimulus venustus Reib. (==ustulatus). Isis., . 104 



51. Bulimulus ustulatus Sowb. Isis., . . . 104 



52. Bulimulus ustulatus Sowb. Conch. Icon., . 104 



PLATE 17 (Orthotomiuni). 



1. Bulimulus dealbatus Say. AVaco, Texas, specimen, . . 128 



2. Bulimulus dealbatus mooreanus. Sabinal, Tex., specimen, 130 

 3-5. Bulimulus dealbatus mooreanus. Derby, Frio Co., spe- 

 cimens, ..... ... 130 



6. Bulimulus dealbatus schiedeanus Pfr. W. Texas, specimen, 131 

 7-13. Bulimulus dealbatus schiedeanus Pfr. Mexico. Biol- 



ogia, ......... 131 



14, 15. Bulimulus dealbatus schiedeanus Pfr. Coahuila speci- 

 mens, ...... 



16. Bulimulus dealbatus patriarcha Binn. Terr. Moll., iv, . 132 



17, 18. Bulimulus alternatus marise. Derby, Frio Co., Texas, 



specimens, ..... .134 



19. Bulimulus alternatus Say. Waco, Texas, specimen, .128 



20. Bulimulus alternatus raarise Alb. Hidalgo, Tex., specimen, 134 

 12. Bulimulus alternatus maria? Alb. Corpus Christi, Tex., 



specimen, ...... . 134 



22-25. Bulimulus alternatus marine Alb. Laredo, Tex., spe- 

 cimens, ..... 



26. Bulimulus alternatus marire Alb. Terr. Moll., Hi; . . 134 



PLATE 18 (Orthotomium). 



27. 29. Bulimulus dealbatus Say. Lee Co., Texas, specimens, 



28. Bulimulus dealbatus Say. Alabama specimen, 



30. Bulimulus dealbatus Say. Texas specimen, 



31. Bulimulus dealbatus ragsdalei Pils. Specimen, . 129 



32. 33. Bulimulus durangoanus Mart. Biologia, . 127 



34. Bulimulus pilula v. cooperi Dall. Specimen, . 139 



