120 REFERENCE TO PLATES. 



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



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



52. Acanthochites diegoensis Pils. Ross del., . . .25 



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



Plate 13. 



55, 56. Acanthochites astriger Rve. Pilsbry del., . . .22 



57. Acanthochites astriger Rve. Conch. Icon., . . .22 



58, 59. Acanthochites pygmseus Pils. Pilsbry del., . . 23 

 60, 61. Acanthochites spiculosus Rve. Conch. Icon., . . 22 

 62. Acanthochites spiculosus Rv. Emerton del., . . 22 

 63,64. Callochiton inornatusTen.-Woods. Tr, Roy. Soc. Vict., 68 



65. Acanthochites hemphilli Pils. Pilsbry del., . . .34 



66. Acanthochites hemphilli Pils. Ross del., . . .34 



67. Acanthochites hemphilli. Posterior view of tail valve. 



Pilsbry del, 34 



Plate 14. 



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

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



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



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



8. Ischnochiton cariosus Cpr. Ross del., 



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

 11-16. Acanthochites garnoti BIv. Voy. Astrol., 



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 



70 



90 



113 



112 



82 

 16 

 14 



Plate 15. 



22-24. Touicella saccharina Dall. Pilsbry del., . 



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



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



27. Ischnochiton smaragdinus Ang. P. Z. S., . Vol. 3 



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

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



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



35. Trachydermon flectens Cpr. Ross del., 



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

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



Plate 16. 



66 

 65 

 65 

 137 

 65 

 65 

 64 

 64 

 64 

 74 



42-46. Ischnochiton serratus Cpr. Pilsbry del.. . . .78 

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



