REFERENCE TO PLATES. 119 



PLATE 9. 



FIGURE. PAGE. 

 1. Cryptoplax oculatus Q. & G. Challenger Rep., . . 55 

 2-5. Cryptoplax oculatus. Valves i, ii, iii and viii. Challen- 

 ger Rep., 55 



6. Cryptoplax burrowi E. A. Smith. Conch. Icon., . . 54 

 7-10. Cryptoplax burrowi. Valves i, ii, iii, and viii. E. A. 



Smith del., 54 



11-14. Cryptoplax striatus Lam. Challenger Rep., . .53 

 15. Cryptoplax striatus Lam. Challenger Rep., . . 53 



PLATE 10. 



1, 2 Chiton subassimilis Souv. Journ. de Conch., . . 99 



3, 4 Chiton discolor Souv. Journ. de Conch., . . 89 



5, 6. Chiton tuberculosus Souv. Journ. de Conch. . . 99 



7. Chiton platymerus Sowb. Beechey's Voy., . . . 115 



8. 9. Chiton obscurellus Souv. Journ. de Conch., . . 99 

 10, 11. Tonicia insculpta Souv. Journ. de Conch., . . 89 

 12. Chiton glaucocinctus Fremb. Zool. Journ. . . . 109 

 13-17. Ischnochiton cessaci Roch. Nouv. Arch. Mus., . . 81 

 18, 19. Chiton fimbriatus Sowb. Conch. 111., . . .110 



20. Chiton undulatus Sowb. Beechey's Voy., . . . 115 



21, 22. Chiton concinnus Sowb. Conch. 111., . . .79 

 23-26. Chsetopleura pustulata Kr. Siidafrik. Moll., . . 73 

 27, 28. Callochiton sanguineus Dh. Moll. Reun., . . 67 

 29, 30. Chsetopleurajaspidea Gld. U. S. Expl. Exped., . 70 



PLATE 11. 



31. Cryptoplax larvseformis Burrow. Ross del., . . .56 



32. Cryptoplax larvseformis. Edge of foot, showing marginal 



row of longer spicules. Pilsbry, del., . . .56 



33. Cryptoplax larvseformis, One sq. mill, of upper surface. 



Pilsbry del., 56 



34. Cryptoplax larvseformis. One of the sutural tufts. Pils- 



bry del., . .56 



35. Cryptoplax larvseformis. Ross del., . . . .56 



36. Cry ptopl ax larvseformis. Valves i,ii, iii, viii. Challenger 



Rep., .56 



37. Cryptoplax striatus Lam. Edge of foot, showing densely 



spiculose upper surface, and asperulate basal surface of 



girdle. Pilsbry del., 53 



38. 39. Cryptoplax striatus Lam. Ross del., . . 53 

 40-43. Cryptoplax striatus. Valves i, ii, viii. Pilsbry del., 53 



PLATE 12. 



44, 45, 47. Acanthochites exqui situs Pils. Pilsbry del., 



46. Acanthochites exquisitus Pils. Ross del., . . .23 



