320 REFERENCE TO PLATES, VOL. XVI. 



31, 32. Microceranras latus Gundl. Novit. Conch 171 



33, 34. Microceramus latus var. Winchester, del 171 



35. Microceramus maculatus Wright. Novit. Conch. . . . 170 



36. Microceramus paivanus Pf r. Winchester, del 169 



37-39. Microceramus nigropictus Gundl. Winchester, del. 170 



40, 41. Microceramus costellaris Gundl. Winchester, del. 169 



42. Microceramus petitianus Orb. Winchester, del 165 



43. Microceramus petitianus perconicus Pils. Winches- 



ter, del 166 



44. Microceramus palenquensis Gundl. Novit. Conch. . . 165 



45. Microceramus minor Arango. Novit. Conch 167 



46. Microceramus simplex Pf r. Novit. Conch 167 



47-49. Microceramus elegans Gundl. Winchester, del. . . 164 

 50. Microceramus elegans infradenticulatus Wr. Win- 

 chester, del 164 



PLATE 28. 



[Figs. 1, 5, 7, 8, 9 drawn by Helen Winchester; the others by H. A. Pilsbry.] 



1-4. Megaspira ruschenbergiana Lea 182 



5, 6. Megaspira elata Gld 186 



7. Megaspira elatior robusta Pils 185 



8. Megaspira elatior gracilis Pils 185 



9. 10. Megaspira elatior Spix , 185 



PLATE 29. 



[Fig. Ifi from Deshayes; 18 from Cox: the others drawn by Pilsbry.] 



11. Megaspira elatior robusta Pils 185 



12, 13. Megaspira elata Gld 186 



14, 15. Megaspira elatior gracilis Pils 185 



16, 17. Eomegaspira exarata Mich 187 



18. Perrieria australis Forbes 192 



19. Perrieria australis Forbes. North Pine river 192 



PLATE 30. 



20. 21. Perrieria clausiliaaf ormis T.-C. J. de Conch 189 



22. Perrieria clausiliagf ormis T.-C. Ann. Mus. Genov. . . 189 



23. Perrieria c. arfakiensis Pils. Ann. Mus. Genov.... 190 



24. Perrieria minor Smith. Ann. Mag. N. H 190 



25. "CcBliaxis" exigua Ad. & Ang. P. Z. S., 1867 193 



26. Perrieria australis Forbes. Warroo. Pilsbry, del.. 192 

 27-29. Perrieria australis Forbes. N. Pine river. Pils- 

 bry, del 192 



30-32. Callionepion iheringi Pils. & Van. Pilsbry, del. . . 179 



