328 EXPLANATION OF PLATES. 



PLATE 16 (Ncesiotus'). 



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

 28, 29. Bulimulus achatellinus Forbes. Conch. Cab:, . . 99 



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



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



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

 34-38. Buliraulus 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 Sowb. Conch. Illustr., . . 103 



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



49. Bulimulus ustulatus Sovvb. Conch. Illustr., . ' . , . 104 



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



51. Bulimulus ustulatus Sowb. Isis 104 



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



PLATE 17 (Orthotomium). 



1. Bulimulus dealbatus Say. Waco, 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, ......... 131 



16. Bulimulus dealbatus patriarch a 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 maria3 Alb. Hidalgo, Tex., specimen, 134 

 12. Bulimulus alternatus mariaj Alb. Corpus Christi, Tex., 



specimen, . . . . . . . .134 



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

 cimens, . . . . . . . . .134 



26. Bulimulus alternatus marine Alb. Terr. Moll., Hi, . . 134 



PLATE 18 (Orthotomium). 



27. 29. Bulimulus dealbatus Say. Lee Co., Texas, specimens, 128 



28. Bulimulus dealbatus Say. Alabama specimen, . . 128 



30. Bulimulus dealbatus Say. Texas specimen, . . . 128 



31. Bulimulus dealbatus ragsdalei Pils. Specimen, . . 129 



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



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



