EXPLANATION OF PLATES, VOL. XIII. 241 



FIGURE PAGE 



6, 7, 8. Placostylus bivaricosus solidus Eth. After Etheridge, 27 

 9, 10. Placostylus bivaricosus etheridgei Braz. Mem. Austr. 



Mus., 26 



PLATE 13. 



1, 2. Placostylus alexander Crosse. Shepperd, del., . . 35 



3. Placostylus salomonis (an incorrect figure). 



4. Placostylus boulariensis Souv. Faun. N.-Caled., . . 50 



5. Placostylus goroensis Souv. Faun. N.-Caled., . . .54 



PLATE 14. 



6. Placostylus alexander leucostoma Cr. J. de C., 1875, , 36 



7. Placostylus alexander crassa Cr. After Kobelt, . . 36 



8. Placostylus alexander Crosse, typical. Rev. Zool., 1855., . 35 



9. 10. Placostylus f'uligineus Pfr. J. de C., 1864, . . .70 

 11, 12. Placostylus fuligineus var. After Kobelt, . . .71 



PLATE 15. 



13, 14. Placostylus fibratus danieli Crosse. Rev. Zool., . . 43 

 15. Placotylus fibratus Martyn. Type figure. Univ. Conch., 39 



16,18. Placostylus fibratus var. After Kobelt, . . .42 



17. Placostylus fibratus var. Ross, del., . . . .42 



19. Placostylus fibratus strigatus Pils. Ross, del., . . 46 



PLATE 16. 



20. Placostylus fibratus ovatus Crosse. Conch. Icon., . . 45 



21, Placostylus fibratus Martyn. Faun. N.-Caled., . . . 39 



22, 24. Placostylus fibratus Martyn. Ross, del., . . .39 

 25.' Placostylus fibratus bairdi Rve. Faun. N.-Caled. I, . . 42 



PLATE 17. 



25. Placostylus fibratus ventricosus Kob. After Kobelt, . . 45 



26. Placostylus fibratus pinicola Gass. After Gassies, . . 42 



27. Placostylus fibratus pinicola (sinistral). J. de C., 1881, . 42 



28. 29. Placostylus fibratus peculiaris Kob. After Kobelt, . 42 



PLATE 18. 



30. Placostylus fibratus crassus Kob. After Kobelt, . . 45 



31, 32. Placostylus fibratus mareanus Cronse. After Kobelr, . 46 



33. Placostylus fibratus ovalis Kob. After Kobelt, . . 45 



34. Placostylus fibratus knoblauchi Kob. After Kobelt, . 43 



16 



