EXPLANATION OF 1'LATES, VOL. XII. 255 



FIGURE PAGE 



20. O. (Metorthalicus) august! Jouss. Bull. Soc. Zool. France, 195 

 21,22. 0. (Metorthalicus) labeo Brod. Zool. Journal, . .199 



PLATE 40 (0.) Metorthalicus} Mletti, etc.). 



23, 24. O. (Metortlialicus) kelletti Rve. Conch. Icon., . . 204 



25. O. kelletti v. t'ungairinoi Hid. .1. de C., . . . . 204 



26, 27. O. kelletti v. f'ungairinoi Hid. Slieppard, del., . . 204 



28. O. kelletti v. 1'imgairinoi Hid. Viaje al Pacifico, . . 204 



29. " Bulinus lacticolor " Sowb. Conch. Illustr., . Vol. X1IJ. 



30. Bulimulus pollonenie Ancey. Bull. Mus. Zool. ed Anat. 



Comp. Torino, ..... Vol. XIII. 



PLATE 46 (Metorthalicus). 



31. Orthalicus (Metortlialicus) f'raseri Pfr. P. Z. S., 1860, . 193 

 32,33. O. (Metorthalicus) fraseri Pfr. Novit. Conch., . .193 

 34, 35. O. fraseri v. brevispira Pils. Slieppard, del., . . 194 



PLATE 47 ( Orthalicus}. 



fi. Orthalicus sultana Dillw. Slieppard, del., . . . 188 



7. O. sultana Dillw. (yallina- sultana Auct.) Conch. Icon., . 188 



8. O. sultana variety. Slieppard, del., . . . . .190 



9. 10, 11. 0. trullisatus Shuttl. Notitite Conch., . . .191 



PL4TE 48. 



12. O. (Metorthalicus) vicarius Fult. Slieppard, del., . . 200 



13. Porphyrobaphe dennisoni var. obscurala Mouss. Novit. 



Conch., 159 



14. Porphyrobaphe dennisoni var. marmatensis Pils. Shep- 



pard, del., ........ 159 



15. 16. Porphyrobaphe dennisoni Reeve. Conch. Icon., . 158 



PLATE 49 (Porplyrobaplte iostoma). 



17. P. iostoma Sowb. Type. Condi. Illustr., . . . 150 



18. P. iostoma Sowb., young shell. Slieppard, del., . . 150 



19. 22. P. iostoma Sowl>. Slieppard, del., .... 150 



20. P. iostoma Sowb. Conch. Icon., . . . . .150 



21. P. iostoma Sowb. Viaje al Pacifico .... 150 



PLATE 50 (Porphyrobaphe}. 



23, 24. P. saturnus Pfr. Pilsbry, del., 153 



25. P. saturnus Pfr. P. Z. S., 1860, 153 



26, 27. P. iostoma v. bilabratus Pils. Slieppard, del., . . 152 



