EXIM.ANATION O V I'LATKS, VOL. XIII. 



I'AI.IC 



('.. 7, 8. Placostylus bivaricosus solidus Eth. After Etheridge, 27 

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



Mus., 20 



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. 



fi. Placostylus alexander leucostonm 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 fuligineus Pfr. ' J. de C., 1864, . . .70 

 11,12. Placostylus fuligineus var. After Kobelt, . . .7) 



PLATE 15. 



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



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

 1C), 18. Placostylus fibratus var. Alter Kobelt, . . .42 

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



19. Placostylus fibratus strigatus Pils. Ross, del., . . . 4H 



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 



2i>. 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 crt.ssus Kob. After Kobelt, . . 45 



31, 32. Placostylus fibratus mareanus Crosse. After Kobelt, . 4<> 



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



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



16 



