336 EXPLANATION OF PLATES. 



95, 96. Callochiton laavis Mont. Pilsbry del., . . 49 



97, 98. Callochiton laevis Mont. Hist. Br. Moll., 49 



PLATE 10. 



1, 2. Callochiton platessa Gld. U. S. Exped., ... 49 



3, 4, 5. Callochiton platessa Gld. Emerton del., . . 49 



6. Callochiton versicolor Ad. (^platessa Gld.). P. Z. S., . 50 



7. Callochiton crocinus Eve. (probably distinct from versi- 



color). Conch. Icon., 50 



8. 10-15. Tonicella marmorea Fabr. Moll. Reg. Arct., . 41 

 16-21. Tonicella submarmorea Midd. Emerton del., . . 42 

 22-24. Tonicella submarmorea Midd. Mai. Ross., . . 42 



PLATE 11. 



25, 27. Tonicella lineata Wood. Ross del., . . . .42 



26. Tonicella lineata Wood. Emerton del., . . . .42 

 28. Tonicella lineata Wood. Pilsbry del., . . . .42 

 29-31. Tonicella sitchensis Midd. Mai. Ross., ... 44 

 32-34. Schizoplax brandti Midd. Sib. Reise, . . .47 

 35-37. Schizoplax brandti Midd. Emerton del., . . .47 

 38, 39. Leptoplax coarctatus Sowb. Emerton del., . . 25 

 40, 41. Ischnochiton interstinctus Gld. U. S. Ex. Exped., . 119 



PLATE 12. 



42. Chsetopleura peruviana Lm. Ross del., . . . .28 



43-46. Chsetopleura peruviana Lm. Emerton del., . . 28 



47. Chsetopleura hennahi Gray. Conch. Icon., . . .29 



48, 49. Chsetopleura hennahi Gray. Ross del., . . .29 



50. Chsetopleura parallela Cpr. Ross del., . . . .34 



51. Chsetopleura columbiensis Sowb. Conch. Illust., . . 34 



52. Chsetopleura columbiensis Sowb. Conch. Icon., . . 34 



53. 54. Chsetopleura lurida Sowb. Conch. Icon., . . .33 

 55, 56. Chsetopleura scabriculus Sowb. (=lurida). Conch. 



111., 33, 34 



PLATE 13. 



57, 58. Chsetopleura isabellei Orb. Voy. Amer. Merid., . 35 



59. Chsetopleura janeirensis Gray. Conch. 111., . . .37 



60. Chsetopleura janeirensis Gray. Pilsbry del., . . .37 

 61,62. Chiton segmentatus Rv. Conch. Icon.(=Chsetopleura 



janeirensis), 37 



63, 64. Chsetopleura spinulosa Gray. Conch. Icon., . . 38 

 65, 66. Chsetopleura dieffenbachi Rve. Conch. Icon., . . 35 

 67, 68. Chsetopleura sowerbyana Rve. Conch. Icon., . . 39 

 69, 70. Chsetopleura gemmea Cpr. Emerton del., . . 31 

 71-74. Chsetopleura gemmea Cpr. Ross del., . . .31 



