EXPLANATION OP PLATES. 429 



riGURB. PAGE. 



56. Pterodonta inflata, d'Orb. Cret., France, . . . 190 



57. Ringicula (Ringinella, Clementina, d'Orb. Cret., France, 357 



58. Cinulia globulosa, Desh. Cret., France, . . . 358 



59. Cinulia (Oligoptycha) concinna, Meek. Cret., Dakota, 358 



60. Cinulia (Avellana) incrassata, d'Orb. Cret., France, . 358 



61. Cyliclma (Actaeonella) crassa, d'Orb. Cret., France, . 359 



62. Etallonia prisca, Desh. Eocene, Paris basin, . . 362 



Plate 89. 



63. Akera soluta Chemn. Philippines, .... 362 



64. Akera (Cylindrobulla)*Beauii, Fischer. Guadaloupe, . 363 



65. 66. Lobiger Philippii, Krohn. Sicily, .... 363 



68, 70. Lophocercus Sieboldi, Krohn. Mediterranean, . 362 

 67, 71. Aplysia depilans, Linn. Europe, .... 363 



69. Phyllaplysia ornata, Desh., ...... 3H4 



72. Aplysiella petallifera. Rang. Mediterranean, . . 364 



73. Dolabrifera Cuvieri, Adams. Isle of Bourbon, . . 364 



74. 75. Dolabella Teremidi, Rang. Society Isles, . . 365 

 76, 77. S_yphonopyge livida, d'Orb. Rio Janeiro, . . 365 



78. Notarchus ocellatus, Rang, ...... 365 



79. Aclesia rufa, Quoy. Moluccas, ..... 365 



80. Bursatella Leachii, BlainA^ East Indies, . . . 365 



81. St3docheilus longicauda, Quoy and Gaimard. N.Guinea, 365 



82. 83. Pleurobranchus citrinus, Riippell. Red Sea, . . 366 



84. Runcina Hancocki, Forbes. England, .... 367 



85. Neda luniceps, Cnvier. So. Europe, .... 367 



86. Susania testudinaria, Phil. Mediterranean, . . . 367 



87. Umbrella Mediterranea, Lam. Mediterranean, . . 368 



88. Umbrella Indica, Lam. East Indies, .... 368 



89. Tylodina punctnlata, Raf. Europe, .... 368 



90. Pleurobranchus ( Pleurobranchsea) Meckelii, Blainv. 



Mediterranean, ........ 366 



91. Posterobi'anchaea macnlata, d'Orb. So. America, . . 367 



Plate 90. 



92. Doris Johnstoni, Alder and Hancock. England,. . 369 



93. Chromodoris magnifica, Quoy. East Indies, . . 370 



94. Hexabranchus sanguineus, Riippell. Red Sea, . .371 



95. Lamellidoi'is Leachii, Blainv. Mediterranean, . . 372 



96. Lamellidoris scutigera, d'Orb. Europe, . . . 372 



97. Acanthodoris pilosa, Miiller. North Sea, . . . 372 



98. Spha?rodoris grandiflora, Rapp. Mediterranean, . 373 



99. Atagema carinata, Quoy. New Zealand, . . . 374 

 100. Doridopsis viridis, Pease. Polynesia, .... 375 



1. Ceratodoris eolida, Quoy. Polynesia, . . . .371 



2. Caselia Gouldii, H. and A. Adams. Australia, , . 375 



3. Triopa claviger, Miill. England, 376 



