REFERENCE TO PLATES. 177 



PLATE 19. 



Fir.URE. PAGE. 



35, 36. Helcioniscus nigrisquamatus Rv. Conch. Icon., . 125 



37, 38. Acrasea striata Q. & G 47 



39, 40. Helcioniscus oruatus Dilhv. Conch. Icon., . . 137 



PLATE 20. 



41, 42. Patella neglecta Gray (zebra Rv.). Conch. Icon., . 95 

 43, 44. Xacella inradiata Rv. Conch. Icon., . . . 120 

 45, 46. Helcioniscus depsta Rv. Conch. Icon., . . . 151 



PLATE 21. 



47, 48. Patella couspicua Ph. Conch. Icon., . . .90 

 49, 50. Helcioniscus denticulatus Martyn (type of P. imbricata 



Rv.). Conch. Icon., . 138 



51, 52. Helcioniscus radians v. earlii Rv. type. C. Icon., . 140 



PLATE 22. 



9, 10. Patella pica Rve. Conch. Icon., . . . .97 



11, 12. Patella ustulata Rve. Conch. Icon., . . .101 

 13, 14. Patella pica Rv. Conch. Icon., . . . .97 

 15, 16. Patella argenvillei Kr. Conch. Icon., . . .95 



PLATE 23. 



1-3. Helcioniscus redimiculum Rv 136 



4, 6-8. Helcioniscus radians v. decora Phil., . . . 140 



PLATE 24. 



9, 10. Patella exusta Reeve. Conch. Icon., . . .98 



11,14,15. Patella plurabea Lm. Conch. Icon., . . .91 



12, 13. Acmsea saccharina L. (lanx Rv.) Conch. Icon., . 49 



PLATE 25. 



16-19. Helciouiscus testudinaria L. Original, . . . 128 

 20, 21. Patella aculeata Rv. Conch. Icon., . . . .100 



PLATE 26. 



22-25. Patella miniata Born. Original, . . . .94 

 26, 27. Patella miniata Born. Conch. Icon., . . .94 

 28, 29. Patella chitonoides Rv. Conch. Icon., ... 98 



PLATE 27. 



30, 32. Patella oculus Born. Original, 106 



34, 35. Patella cochlear Born. Conch. Icon., . . . 104 

 12 



