120 REFERENCE TO PLATES. 



FIGURE. PAGE. 



48, 49, 51. Acanthochites rhodeus Pils. Pilsbry del., . . 26 



50. Acanthochites rhodeus Pils. Ross del., . ' . . .26 



52. AcauthochitesdiegoensisPils. Ross del., . . .25 



53, 54. Acanthochites diegoensis Pils. Pilsbry del., . . 25 



PLATE 13. 



55, 56. Acanthochites astriger Rve. Pilsbry del., . 



57. Acanthochites astriger Rve. Conch. Icon., 



58, 59. Acanthochites pygmseus Pils. Pilsbry del., 

 60, 61. Acanthochites spiculosus Rve. Conch. Icon., 

 62. Acanthochites spiculosus Rv. Emerton del., 



63, 64. Callochiton inornatus Ten.- Woods. Tr. Roy. Soc. Viet. 



65. Acanthochites hemphilli Pils. Pilsbry del., . 



66. Acanthochites hemphilli Pils. Ross del., 



67. Acanthochites hemphilli. Posterior view of tail valve 



Pilsbry del., 



PLATE 14. 



22 

 22 

 23 

 22 

 22 

 68 

 34 

 34 



34 



1, 2. Chsetopleura asperrima Couth. U. S. Expl. Exped., 70 



3, 4. Tonicia floccata Sowb. Conch. Icon., ... 90 



5. " Chiton " castaneus Couth. U. S. Expl. Exped., . 113 



6, 7. Plaxiphora? hyadesi Roch. Moll. Cap Horn, . 112 



8. Ischnochiton cariosus Cpr. Ross del., . . 82 



9, 10. Acanthochites zelandicus Q. & G. Voy. Astrol., 16 

 11-16. Acanthochites garnoti Blv. Voy. Astrol., 14 



17. Ischnochiton haddoni. Girdle-scale, . Vol. xiv 88 



18. Ischnochiton longicymba var. Girdle-scales. Vol. xiv 87 



19. Ischnochiton longicymba var. Ross del., 87 



20. 21. Lepidopleurus algesirensis Cap. Journ. de Conch., . 62 



PLATE 15. 



22-24. Tonicella saccharina Dall. Pilsbry del., . . .66 



25. Trachydermon ruber, girdle-scales. Pilsbry del., . . 65 



26. Trachydermon dentiens. Girdle-scales. Pilsbry del., . 65 



27. Ischnochiton smaragdinus Ang. P. Z. S., . Vol. xiv, 137 



28. 29. Ischnochiton gothicus Cpr. Pilsbry del., . . 65 

 30-33. Callochiton aleuticus Dall. Pilsbry del., . . 65 



34, 36. Trachydermon flectens Cpr. Pilsbry del., . . 64 



35. Trachydermon flectens Cpr. Ross del., . . .64 

 37. Trachydermon flectens. Girdle-scales. Pilsbry del., . 64 

 38-41. Chsetopleura asperior Cpr. Pilsbry del., . . .74 



PLATE 16. 



42-46. Ischnochiton serratus Cpr. Pilsbry del 78 



47,50,51,52. Ischuochiton reteporosus Cpr. Pilsbry del., . 77 



