EXPLANATION OF PLATES. 343 



36-41. Tonicia disjuncta Fremb. Emerton del., . . . 212 

 42-51. Craspedochiton laqueatus Shutt. Emerton del., . 285 

 52. Ischnochiton rugulatus Sowb var. Conch. Icon., . . 110 



PLATE 40. 



1,2. Tonicia truncata Sowb. Conch. Icon., . . . 211 



3, 4. Tonicia fortilirata Sowb. Conch. Icon., . . . 207 



5, 6. Tonicia picta Sowb. Conch. Icon., . . . .211 



7. Tonicia carpenteri Angas. P. Z. S., . . . . 208 



8-11. Tonicia lamellosa Q. & G. Voy. Astrol., . . .209 



12. Tonicia zschaui Pffr. Moll. S. Georg., .... 204 



13-15. Tonicia tehuelchus Orb. Voy. Amer. Merid, . . 205 



16, 17. Tonicia suezensis Rve. Conch. Icon., . . . 206 



PLATE 41. 



19. Tonicia chilensis Fremb. Pilsbry del., . . . .197 



20. Tonicia chilensis Fremb. Conch. Icon., . . . .197 



21. Tonicia fastigiata Sowb. Pilsbry del., . . . .199 



22. Tonicia elegans Fremb. Pilsbry del., .... 196 

 Betw. 22 and 24. Tonicia elegans Fremb. (color-pattern only). 



Pilsbry del., 1$6 



24. Tonicia elegans Fremb. (second valve). Pilsbry del., . 196 



25. Tonicia lineolata Fremb. Conch. Icon., . . . .198 



26. Tonicia lineolata Fremb. Zool. Journ., .... 198 



27. Tonicia lineolata (var. connecting with elegans). Ross 



del., . . .198 



28. Tonicia atrata Sowb. Conch. 111., . . . .201 



29. 30. Tonicia atrata Sowb. Conch., Icon., . . .201 



PLATE 42. 



31. Tonicia elegans Fremb. Ross del., . . . .196 



32. Tonicia elegans Fremb. var. Conch. Icon., . . . 196 



33. 34, 35. Tonicia elegans Fremb. (not typical). Emerton, 



del, . .196 



36-39. Tonicia fastigiata Gray. Conch. Icon, . . . 199 



40. Tonicia chikensis (^fastigiata). Conch. Icon., . . 199 



PLATE 43. * 



41. Tonicia swainsoni Sowb. Conch. Icon, .... 201 



42. Tonicia swainsoni Sowb. Pilsbry del., . . . . 201 



43. Tonicia swainsoni Sowb. Ross del, .... 201 



44. 45. Tonicia granifera Sowb. Conch. Icon, . . . 200 

 46, 47. Tonicia gravi Sowb. Conch. Icon, .... 200 

 48, 49. Tonicia (?) martieli Rochebr. Moll. Cap Horn, . 203 

 50, 51. Tonicia horniana Rochebr. Moll. Cap Horn, . . 203 

 52, 53. Tonicia lebruni Rochebr. Moll. Cap. Horn, . . 203 



