342 EXPLANATION OF PLATES, XVII. 



FIGURE PAGE 



13. D. ecostatum Hutt. From Macleay Mem. Vol., . .102 

 14-18. D. matara Dall. Pilsbry, del., . . 105 



PLATE 19. 



1. D. lacteum Dh. From Deshayes, 99 



2. D. rubescens Dh. From Deshayes, 1 05 



3. D. malzani Dkr. From Clessiii, 107 



4. D. ambiguum Chenu. From Chenu, .... 100 



5. D. translucidum Dh. From Deshayes, . . . .99 



6. D. siculum Dh. From Costa, 107 



7. 8. D. bisinuatum Andre. From Rev. Suisse ZooL, . .108 

 9. D. callipeplum Dall. From Blake Rep., . . . .100 



10-15. D. stenoschizum P. & S. Pilsbry, del., . . .128 



16, 17. D. tenuifissum Monts. From Costa, . . . .129 



18, 19. D. politum L. From Thes. Conch., . . . .128 



20, 21. D. politum L. From Deshayes, . . . .128 



22. D. lubricatum Sowb. From Thes. Conch., . . . 110 



23. D. erectum Sowb. From Thes. Couch., . . .111 



PLATE 20. 



24. D. phaneum Dall. From Proc. U. S. Nat. Mus., . . 59 



25. D. complexum Dall. From Proc. U. S. Nat. Mus., . . 76 



26. D. acutissimum Wats. From Chall. Rep., .'..'. .94 



27. D. Eegeum Wats. From Chall. Rep., . . 



28. D. attenuatum Sowb. From Thes. Conch., . . . 120 



29. Entalina mirifica Smith. From Ann. Mag., . . . 134 



30. D. sowerbyi Guild. From Tr. Linn. Soc., . . .117 



31. D. philippinarum Sowb. From Thes. Conch., . . . 116 



32. D. philippinarum Sowb. Specimen,. . . .116 



33. D. eburneum L. Specimen, . . . . .115 



34. D. eburneum L. From Thes. Conch., . . . 115 

 35,36. D. longitrorsum Rve. From Thes. Conch., . Ill 



PLATE 21. 



37-39. D. liodon P. & S. Pilsbry, del., 107 



40, 40. D. liodon v. alloschismum. Pilsbry, del., . . . 108 

 -41, 42. D. liodon v. alloschismum. Pilsbry, del., . .108 



43. D. aequatorium P. & S. Specimen, . 



44. D. watsoni P. & S. Specimen, . 



45. D. rectius Cpr. Specimen, .... 



46. 46. D. dalli P. & S. Specimen, 114 



47. 48. D. inversum Dh. Pilsbry, del., . . 95 

 49. D. inversum Dh. From Thes. Conch., . . . .95 



