REFERENCE TO PLATES. 249 



PLATE 53. 



FIGURE. PAGE. 



81-83. Pleurobranchsea meckelii Blv. Pilsbry, del., .... 224 



84. Pleurobranchrea raeckelii Blv. After Bergh, 224 



85. Pleurobranchsea meckelii Blv. After Cantraine, .... 224 



86. Pleurobranchrea tarda Verrill. After Verrill, 225 



87. Pleurobranchrca novrczealandise Cheesem. P. Z. S., . . . 227 



88. 89. Pleurobranchrea maculata Q. & G. Voy. Astrol., . .227 

 90. Oxynoe antillarum Morch. Pilsbry, del., 164 



PLATE 54. 



90-94. Koonsia morosa Bgh. After Bergh, 222 



95. Pleurobranchfea luniceps Cuv. After Cuvier, 228 



96, 97. Pleurobranchaia luniceps Cuv. After Adams, . . . 228 

 98, 99, 1, 2. Pleurobranchus digueti Roch. Pilsbry, del, . . 201 



3, Aglaja orbignyana Roch. Nouv. Archiv., 239 



4, 5. Oscanius dilatipes Ads. Gen. Rec. Moll., 216 



PLATE 55. 



1-4. Tethys willcoxi var. perviridis Pils. Pilsbry, del., . . 81 



5, 6. Tethys robertsi Pils. Pilsbry, del., 89 



7-9. Petaiifera ferussaci Rang. After Rang, 130 



10-12. Petaiifera virescens Risso. After Vayssiere 129 



13, 14. Petaiifera quadrata (=virescens). After Sowb., . 



PLATE 56. 



13, 14. Tethys californica Coop. Pilsbry, del., 89 



15-17. Tethys lessoni Rang. After Rang, 86 



PLATE 57. 



18, 19. Tethys angasi Sowb. Conch. Icon., 



20, 21. Tethys tigrina Sowb. (=sowerbyi). Conch. Icon., . . 101 



22, 23. Tethys sydneyensis Sowb. Conch. Icon., 101 



24-27. Tethys tryoniana Pils. Pilsbry, del., 96 



PLATE 58. 



28, 29. Tethys gigantea Sowb. Conch. Icon., . . 



30, 31. Tethys hyalina Sowb. (=excavata). Conch. Icon., . 1 



32, 33. Tethys excavata Sowb. Conch. Icon., 100 



PLATE 59. 



34. Tethys fusca Tiles. After Rang, -104 



35, 36. Tethys elongata Pse. Don. Bism., . . 



