242 EXPLANATION OF PLATES, VOL. XIII. 



PIGURE PAGE 



PLATE 19. 



35. Placostylus fibratus bairdi Rve. Conch. Icon., . . 42 



36, 37. Placostylus fibratus strigatus Pils. Ross, del., . . 4(5 

 88. Placostylus fibratus bairdi Rve., . . . . .42 



39. Placostylus fibratus edwardsianus Gass. Ross, del., . . 45 



40. Placostylus fibratus edwardsianus Gass. Faun. N.-Caled., 45 



PLATE 20. 



41. Placostylus fibratus bovinus Brug. Ross, del., . . .42 



42. Placostylus senilis minor Kob. After Kolelt, . . .53 



43. Placostylus resopeus Gass. After Gassies, . . .48 



44. Placostylus arenosus Gass. After Gassies, . . .46 



45. Placostylus abbreviatus Gass. After Gassies, . . .37 



PLATE 21. 



46. Placostylus guestieri rhinocheti Kob. After Kobelt, . 52 

 4t. Placostylus fibratus imbricatus Gass. J. de C., 1873, . 44 



48. Placostylus guestieri confusus Pils. (^Cicatricosus Kob.). 



After Kobelt 52 



49, 50. Placostylus guestieri orientalis Kob. After Kobelt, . 52 



PLATE 22. 



I, 2, Placostylus kanalensis tchioensis Kobelt. After Kobelt, 38 



3. Placostylus lamberti Gassies. After Gassies, . . .49 



4. Placostylus souvillei Morel. After Kobelt, . . .48 



PLATE 23. 



1. Placostylus kanalensis Crosse. Ross, del., . . .38 



2. Placostylus kanalensis Crosse. J. de C., 1894 . . 38 



3. Placostylus kanalensis Crosse. After Kobelt, . . .38 



4. Placostylus kanalensis subeft'usus Kob. After Kobelt, . 39 



PLATE 24. 



9. Placostylus guestieri Gass. After Kobelt, . . .51 



10. Placostylus guestieri gatopensis Cr. J. de C., 1894, . . 51 



II. Placostylus guestieri Gass. After Gassies, . . .51 



12. Placostylus rossiteri Braz. After Kobelt, . . .34 



13. Placostylus rossiteri Braz. J. de C., 1881, . . .34 



PLATE 25. 



14. Placostylus buccalis Gass. Faun. N.-Caled., . . .53 

 15,16. Placostylus guestieri Gass. Ross, del., . . .51 



17. Placostylus fibratus insignis Petit. J. de C., 1850, . . 43 



18. Placostylus fibratus insignis Petit. After Kobelt, . . 48 



